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Thread: Unusual chapter ring markings - what do they mean?

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  1. #1
    Master danmiddle2's Avatar
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    Unusual chapter ring markings - what do they mean?

    I recently acquired a Nautec chronograph diver from SC. It has a pretty standard chronograph, day/date and diving bezel.

    On the chapter ring it has the following numbers around the outside. 700, 360, 240, 180, 140, 120, 100, 90, 80, 70, 65 and 60. The 60 is located at the 6 o'clock position.

    Can anyone tell me what these mean, please?

    The sales thread is here, I hope AZTIME doesn't mind me stealing the pics
    https://forum.tz-uk.com/showthread.p...ghlight=nautec

    Last edited by danmiddle2; 9th October 2018 at 10:39.

  2. #2
    Master stoneyloon's Avatar
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    Is it a reverse tach ring?

    The ring is upside down, so you then use the "chequered" end of the second hand to use the tach scale, and the red end to measure seconds.

    Just a thought?



    Sent from my iPhone using Tapatalk

  3. #3
    Master DMC102's Avatar
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    Looks like a tachymeter scale, but unusually oriented and presumably working in conjunction with the black and white striped hand.

    EDIT: Ah it's the elongated end of the chrono seconds hand. Ingenious.

  4. #4
    Craftsman
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    Now that we presumably know the "what", maybe someone can explain why ...

  5. #5
    Master danmiddle2's Avatar
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    Thanks for the replies, I now need to look up what a tachymeter scale is/does!

  6. #6
    Master sweets's Avatar
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    It is very simple, you use the chronograph to time how long it takes to complete something.
    The scale then tells you how many are completed in an hour.
    So if you use it to time travel between two km posts on a french autoroute, and the answer is about 25 seconds, the stripey hand will be pointing to 140, you are travelling 140 kmh.
    If your servant can fold a napkin into a swan in 35 seconds, he can do 100 in an hour.

    And so on

    Dave
    Last edited by sweets; 9th October 2018 at 23:24.

  7. #7
    Craftsman
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    Quote Originally Posted by sweets View Post
    If your servant can fold a napkin into a swan in 35 seconds, he can do 100 in an hour.
    Haha, worth getting a chronograph with a tach just to find out.

  8. #8
    Craftsman
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    Quote Originally Posted by sweets View Post
    It is very simple, you use the chronograph to time how long it takes to complete something.
    The scale then tells you how many are completed in an hour.
    So if you use it to time travel between two km posts on a french autoroute, and the answer is about 25 seconds, the stripey hand will be pointing to 140, you are travelling 140 kmh.
    If your servant can fold a napkin into a swan in 35 seconds, he can do 100 in an hour.

    And so on

    Dave
    Ta for this. The napkin example was especially enlightening.

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