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Thread: PRS-25 Everest with Acrylic Crystal

  1. #1
    Master TheGent's Avatar
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    PRS-25 Everest with Acrylic Crystal

    Evening! Iíve spoken to a couple of members here whoíve been keen on the idea of modifying the PRS-25 from a Sapphire to an Acrylic Crystal. I thought Iíd give it a go.

    Using dimensions provided from one of the case drawings and post #135 here (https://forum.tz-uk.com/showthread.p...Smiths-Everest) I set about ordering some tension ring acrylic crystals in several diameters above and below the suggested 31.5mm.

    A bit of trial and error letter, and a bit of adjustment to a tension ring with a dremel tool and.... success. My chief concern was getting water resistance with a acrylic crystal. But the tension ring helps there. I checked the case in the testing tank (up to 6bar) before reassembly - no issues.

    Here are some photos of the completed watch:









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  2. #2
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  3. #3
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    Meanwhile - hereís what I did to the tension ring.

    With the crystal fitted I found the tension ring was too polished and had a step to the rehaut, see my crude drawing below:



    You can see it here in this photo:



    My intention was to remove the material shown as hashed in diagram A, and apply a brushed finished. But then I found you could buy a tension ring that was recessed, as in diagram B, so there was less material to remove:




    Thatís exactly what I did, then turned the tension ring upside down, then placed it back in the crystal before installing into the case, as shown in this diagram:



    Happy to explain further if anyone is interested.

    For me - this makes the watch perfect. I love the way acrylic picks up scuffs along with the rest of the case, and I think it adds to the vintage feel of the design.


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  4. #4
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    Quote Originally Posted by Velorum View Post
    This is the one!

    It looks so much better without the horrible milky ring

    If only they came like this as standard

    Great work Graham!
    Thank you Ian!


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  5. #5
    Apprentice Nastadon's Avatar
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    PRS-25 Everest with Acrylic Crystal

    Woah, great work! The minute track really opens up without the milky ring


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  6. #6
    Journeyman fogar's Avatar
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    Simply amazing. As someone said once about the 1016, the crystal makes the watch.

  7. #7
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    Quote Originally Posted by Nastadon View Post
    Woah, great work! The minute track really opens up without the milky ring


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    Yes, nice to see the ĎGreat Britainí more clearly as well.


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  8. #8
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    Quote Originally Posted by fogar View Post
    Simply amazing. As someone said once about the 1016, the crystal makes the watch.
    Looks a lot more like your avatar now too


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  9. #9
    Master
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    That looks amazing. What a massive transformation

  10. #10
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    Well done @TheGent Looks really great.

  11. #11
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    Quote Originally Posted by hondzax View Post
    Well done @TheGent Looks really great.
    Quote Originally Posted by MADDOG View Post
    That looks amazing. What a massive transformation

    Thank you


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  12. #12
    Craftsman
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    Would agree field watch designs work better with acrylic crystals, only example I've seen in hand which seems OK with the sapphire crystal is the CWC Sub-Hunter, possibly helped by a white dial, the seconds rail track not quite extending to the edge of the case and a fairly flush crystal fit.

    Mind I'm not thinking of going radical with the incoming Nav, will stay as designed.
    Last edited by Ed875; 16th November 2020 at 00:16.

  13. #13
    Grand Master
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    Nice work OP!

    Can you provide the reference for the crystal you used?

  14. #14
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    Quote Originally Posted by walkerwek1958 View Post
    Nice work OP!

    Can you provide the reference for the crystal you used?
    Cheers. Sure thing, ATCR Sternkreuz 31.4


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    Journeyman engrneil's Avatar
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    Well said.
    Quote Originally Posted by MADDOG View Post
    That looks amazing. What a massive transformation
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  16. #16
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    Beautiful work! I entirely agree that the crystal should pick up character with the rest of the case. Wish I had your skill to try it with my own.

  17. #17
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    Quote Originally Posted by Mattcurry View Post
    Beautiful work! I entirely agree that the crystal should pick up character with the rest of the case. Wish I had your skill to try it with my own.
    Cheers. It was a little bit tricky but worthwhile certainly.


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  18. #18
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    Just wow!
    Superb job. That looks amazing.
    Always liked the acrylic in the Mk1 Everest.

  19. #19
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    Quote Originally Posted by SussexScots View Post
    Just wow!
    Superb job. That looks amazing.
    Always liked the acrylic in the Mk1 Everest.
    Thank you!


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  20. #20
    Quote Originally Posted by TheGent View Post
    Cheers. It was a little bit tricky but worthwhile certainly.
    Once you've done half a dozen it will be easier. I reckon it'll be a five minute job after the first ten.

    I mean, you are offering this service as an aftermarket mod, right?

  21. #21
    PS I wonder if acrylic is the next trend? Like smaller watches and vintage lume it will have to start with the microbrands before the Big Names pick it up and start copying, always playing catch up. We are their market research dept! Where Eddie leads, Omega and Rolex follow.

  22. #22
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    Quote Originally Posted by Rev-O View Post
    Once you've done half a dozen it will be easier. I reckon it'll be a five minute job after the first ten.

    I mean, you are offering this service as an aftermarket mod, right?
    Haha - tempting


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  23. #23
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    Quote Originally Posted by Rev-O View Post
    PS I wonder if acrylic is the next trend? Like smaller watches and vintage lume it will have to start with the microbrands before the Big Names pick it up and start copying, always playing catch up. We are their market research dept! Where Eddie leads, Omega and Rolex follow.
    Thatís a really interesting point. Iíd like to think so! But I can see it now, big names charging an additional £XXX for authentic acrylic crystal as found on the original watch....


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  24. #24
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    Quote Originally Posted by Rev-O View Post
    PS I wonder if acrylic is the next trend? Like smaller watches and vintage lume it will have to start with the microbrands before the Big Names pick it up and start copying, always playing catch up. We are their market research dept! Where Eddie leads, Omega and Rolex follow.
    Sadly Eddie has been explicit that sapphire makes his life significantly easier. A pity.

  25. #25
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    Quote Originally Posted by M4tt View Post
    Sadly Eddie has been explicit that sapphire makes his life significantly easier. A pity.
    Makes sense from a business perspective.


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  26. #26
    Grand Master abraxas's Avatar
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    Quote Originally Posted by Rev-O View Post
    ....

    I mean, you are offering this service as an aftermarket mod, right?
    It needs to be said that the work will invalidate the warrantee.
    Watches Are Now Jewellery, eeew !!!

  27. #27
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    Quote Originally Posted by abraxas View Post
    It needs to be said that the work will invalidate the warrantee.
    It certainly does, very good point. I was happy to take that risk on my own watch.


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  28. #28
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    My old Sinn 356 UTC had an acrylic, domed crystal and I loved it. If I wore a hat, I'd well and truly take it off to you.

    Top job!

  29. #29
    Grand Master
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    Good work OP, it's perfect now.

  30. #30
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    Quote Originally Posted by Passenger View Post
    Good work OP, it's perfect now.
    Quote Originally Posted by DennisK View Post
    My old Sinn 356 UTC had an acrylic, domed crystal and I loved it. If I wore a hat, I'd well and truly take it off to you.

    Top job!
    Thank you both.


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  31. #31
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  32. #32
    I was wondering whether a three piece case might be possible, with two bezels / crystals: one sapphire one acrylic. Screw on fit. (A bit like the way Eddie is offering the two casebacks with the monopusher, "solid" and display.)

  33. #33
    Grand Master abraxas's Avatar
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    Quote Originally Posted by TheGent View Post
    I must say, it does look good.
    Watches Are Now Jewellery, eeew !!!

  34. #34
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    Quote Originally Posted by Rev-O View Post
    I was wondering whether a three piece case might be possible, with two bezels / crystals: one sapphire one acrylic. Screw on fit. (A bit like the way Eddie is offering the two casebacks with the monopusher, "solid" and display.)
    That would be amazing.


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  35. #35
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    It looks great. I still like the peace of mind I get with sapphire, but it does look amazing with the acrylic.


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  36. #36
    TheGent, that looks great. How many PMs have you had now? How long is your waiting list? Ha

  37. #37
    Master TheGent's Avatar
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    Quote Originally Posted by wileeeeeey View Post
    TheGent, that looks great. How many PMs have you had now? How long is your waiting list? Ha
    Haha

    Quote Originally Posted by Deacon211 View Post
    It looks great. I still like the peace of mind I get with sapphire, but it does look amazing with the acrylic.

    I know what you mean, but Iíve actually found that acrylic is more robust than is generally perceived!

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  38. #38
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    Love an acrylic crystal. Great mod OP, I am imagining the Navigator with acrylic and in my imagination it looks very very good!

  39. #39
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    Absolutely beautiful!

  40. #40
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    Two thumbs up for the great work, OP. Looks perfect!

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  41. #41
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    Quote Originally Posted by andyd30 View Post
    Love an acrylic crystal. Great mod OP, I am imagining the Navigator with acrylic and in my imagination it looks very very good!
    Quote Originally Posted by ywl23n View Post
    Two thumbs up for the great work, OP. Looks perfect!

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    Thank you


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  42. #42
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    Looks really nice and gives the watch a really authentic feel. fancy modifying mine too?


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  43. #43
    Excellent work G, good luck with the inbox

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  44. #44
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    Great job OP! That looks superb, Iíd love to compare it with the sapphire in the flesh.

    Actually, I donít think Iíve ever handled an Everest!

  45. #45
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    PRS-25 Everest with Acrylic Crystal

    Quote Originally Posted by Crowsfoot View Post
    Looks really nice and gives the watch a really authentic feel. fancy modifying mine too?


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    Thank you - it certainly makes it feel closer to a vintage watch. The same way a speedmaster does I think.


    Quote Originally Posted by nickyboyo View Post
    Excellent work G, good luck with the inbox

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    Haha - cheers Nick!

    Quote Originally Posted by Kirk280 View Post
    Great job OP! That looks superb, Iíd love to compare it with the sapphire in the flesh.

    Actually, I donít think Iíve ever handled an Everest!
    Thank you. It makes the watch feel a little larger than the sapphire, ie the dial looks wider and the whole watch is a little bit taller as well. I think it takes it closer to the original explorer size and feel. Iím assuming that, as Iíve never handled a 1016!




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    Last edited by TheGent; 17th November 2020 at 10:27.

  46. #46
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    Wow, great job. Acrylic crystals do look great, especially on vintage inspired watches. It just fits the overall theme.

  47. #47
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    Quote Originally Posted by madsdrastrup View Post
    Wow, great job. Acrylic crystals do look great, especially on vintage inspired watches. It just fits the overall theme.
    True. Nothing else replicates it.


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  48. #48
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    This is absolutely fantastic! I love my Everest but believe Iíd be even more infatuated if it had an acrylic crystal.

    Seriously, this is way beyond my abilities but if I could find someone local to take it on, I can see some post lockdown cash going that way. Massive thanks for taking the plunge and for the lust-worthy photos, Mr Gent.


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  49. #49
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    Quote Originally Posted by NCC66 View Post
    This is absolutely fantastic! I love my Everest but believe Iíd be even more infatuated if it had an acrylic crystal.

    Seriously, this is way beyond my abilities but if I could find someone local to take it on, I can see some post lockdown cash going that way. Massive thanks for taking the plunge and for the lust-worthy photos, Mr Gent.


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    Thank you!

    For me, it takes it to a new level.


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  50. #50
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