Re. the Casio I bought a little while ago, I received the replacement hour-marker ring, which was pre-lumed, but not very well, and I got a Bergeon DiY luming kit from Cousins, via my goldsmith mate, and spent an interesting couple of hours mixing up some lume and applying it to the markers.
It’s a fairly simple, if fiddly process, you need to use the oiler pin to mix the stuff up, then pick up small amounts and apply to the markers, which isn’t like just brushing it on; (there are YouTube videos to show you how to do it). I’m starting to suffer from arthritis in my thumb joints, which is making such processes increasingly difficult, sadly, but once I had a decent amount of lume on the markers and let it set overnight, I opened up the watch, took the module out and swapped the marker ring over and put it all back together.
I’m rather pleased with the result…
😁
I’m not 100% on the naming thru the years but to know it meets iso spec it currently needs “divers 200m” written on it
Yes, exactly that – it’s why the 007 in particular was so popular, but any with “divers 200m” are properly ISO certified.
Yes seiko can be regulated, they are finicky though or so I read.
Yes, they can, and you’re not wrong! When I first got my SPORK, it was quite a bit out, so I asked my goldsmith mate if he could tweak it, because he’s used to opening up watches to replace batteries, so he had a go. It was just as far out, but in the other direction! When I asked him if he could do it again, he politely suggested I get a caseback tool and do it myself!
The margin for error on the adjuster is basically fractions of a millimetre, you need some good magnifying glasses, and a very fine pointed tool to nudge the adjuster, and ideally a watch-holder to hold the watch firmly while you poke the little lever. Then you close it up and keep an eye on how much it’s losing or gaining.
Then you do it again.
And again.
I think after my third attempt, I got it to about a minute a month fast, which I admit was more luck than anything else, and although it’s gone out of adjustment since, that’s over ten years or so, and I don’t wear it often enough now to worry about it.
Have fun!