Most crystals can be polished - glass and sapphire can be polished with diamond paste.
I have one or two scratches on the crystal of my 7T27-7A20. Is that something which can be recovered (e.g. Polywatch), or would it be a case of a new crystal? Wondering if this one is polishable or not?
They're quite minor and down at one edge so could easily live with, but....I do like my watches looking pristine! :-)
Most crystals can be polished - glass and sapphire can be polished with diamond paste.
It's just a matter of time...
Thanks. From what I read it seems like the crystal is 'Hardlex', would that be right? It sounds like polishing out might take quite a while to achieve!
.. If it is hardlex, it can be done - but don't be in a hurry .. Set of diamond polishing paste tubes and go at it for an hour a go for a couple of weeks.. I'd a KS crystal that had /no/ availability on replacement crystal with some nasty gouges I got back to as per the below ..
al
More like nigh on impossible and a complete waste of effort, for the cost of a replacement crystal.
The original Seiko crystal p/n is obsolete and NLA, but there's the Sternkreuz substitute, p/n XMF320.927 - available from Cousins UK for £4.15 + VAT.
https://www.cousinsuk.com/search?SearchTerm=xmf320.927
Last edited by Seiko7A38; 14th January 2018 at 13:59. Reason: Checking part # cross reference
I've used cerium oxide glass polishing compound to good effect on Seiko's with hardlex though does take some time.