I may have missed it in the Wiki, but is there a table of dimensions for the O'rings that seal the watches?
I'm a little outside the correct realm here, as I have several Casio DW-260s, which aren't quite G-Shocks. I had a DW-210 in the 80s, and loved it. I can't remember what happened to it but I replaced it with a DW-260 which I've had ever since. When I realized that Casio wasn't making anything like it any more, I picked up a few more on Ebay over the years.
As the batteries wear out, I'm finding that the seals are often on their last legs. I used the phone number in the parts thread to order a replacement seal from Casio, but the nice gentleman on the line told me that they only had one available. So I got that one. But I have several watches, which I plan to keep forever...
Before I use this seal, I would like to measure it and see if replacements are available outside of Casio.
A local seal place used their micrometer on it and got .75mm for the width (thickness) and a smidgeon over 28mm for the inside diameter (size of the O it makes).
I measured the seal channel in the watch bezel and got 28mm ID (inside diameter) and 30mm OD (outside diameter). If the thickness is really .75mm (I saw her measure it and she was really careful and redid it several times), then it seems like 28.25mm ID X 29.75mm OD and .75mm W would make sense.
The issue with simply measuring the ID of the new seal I have is that it's really hard to measure the ID of a flexible seal.
The local seal place can't get anything with a .75mm width. 1mm is the smallest available.
I found a place on-line which will do a custom run of O'rings for about $100 for 100 of them (probably many more than I'll ever need). Or $118 / qty. 200.
Before I go that route, I thought it would be useful to seek out three pieces of information.
1) Does someone have the dimensions of this O'ring available, so I can confirm or deny my measurements? I asked the Casio sales guy, but he said all they had was the part number, not the dimensions.
2) Does another, more recent, still supported, Casio watch use the same O'ring, so I could just order that part number instead?
3) Failing #2, if there's a table of dimensions of Casio seals somewhere, I'd like to look up which other old watches use the same seal (if any) so I can see if there's anyone else who could use this size seal before I order 50 - 150 more than I'll ever use.
4) Sure, I said three questions, above, but I thought of a fourth before I hit "submit". Is the material used for the seals simple nitrile rubber (Buna-N)?
Thank you for your time and attention,