Hey, so I have a question. I've got an Invicta dive watch with a NH35A movement here that whenever I unthread the stem and crown as it is unthreading the date starts changing. Once its unthreaded I can change it to the 1, 2 and 3 positions and set and wind it accordingly. How can I fix this and what is causing this?
Yours truly, Josh
Early 60's Elgin 10K Shockmaster. I suppose one of their attempts at water proofing a watch (see the crystal and gasket in the second picture). The question is how to get the crown off (Its wobbly when pulled out to the set position and I am certain it contains a gasket) so I can remove the movement? Dis-assemble the keyless works in place so I can grab the stem and unscrew the crown?? Thanks.
I am working on a vintage watch and the crown of the watch is fitted with a hidden type gasket which is
in terrible condition and needs to be replaced.
However, I found it difficult to pull the gasket out with my tweezers or tooth pick.
Could anyone recommend an easier way to remove this kind of gasket from the crown??
I forgot to take a photo of the crown so I attached a similar example I found on the web.
Any advice out there for cleaning/polishing watch crystal glass?
I know there are videos upon videos on howto clean acrylic watch crystal glass using toothpaste, Cape Cod cloths, an old toothbrush, etc.
However, I am trying to get a number of scratches out of a watch crystal I have taken the movement out of. It is for me a "tester".
I am fairly sure that this "tester" watch crystal is glass.
I have sandpaper (wet/dry) and I have a Cape Cod cloth which I have just started using.
I think you can see the scratches in question in the pics.
So, what I have done so far is use 400-grit sandpaper to scrub across the grain of the scratches. I have also tried scrubbing in a circular motion.
Maybe I am just not very persistent at this. I scrubbed for some time. But all I can see is that NOTHING is disappearing, and the only thing that IS happening is that now the whole glass is covered in a new set of sandpaper-made marks.
Maybe I can use the Cape Cod cloth to get these out. Maybe I can use the other 1500-grit sandpaper to smooth things out too.
This process looks so easy in the various Youtube videos. yes, I know these things can take time, but HOW LONG?? This is NOT one of the fun sides of watch repair that I am looking forward to doing now or, in fact, any time.
I really thought that it would be the case that - scratches and marks on the crystal? No problem! I can get them out! :)
But perhaps I was naive (?)
How long should I be scrubbing with the sandpaper? Is 400-grit not enough? Should I get more coarse sandpaper?
Hello there watch fix fans. Here's (I hope) an interesting one for you.
I have this beautiful small ladies 'Fero Feldmann' Swiss-made watch - it came in a bag of "used and to be repaired" watches.
From what I can see, the mechanism seems in very good working order. Just a slight shake and it goes and goes. There is no strap, but that is not the issue here.
The problem is the stem and/or crown. As you can see, there is definitely no crown. But I am wondering about the stem.
The watch does have its case and edoes have, as you can see, a hole where the stem and/or crown will/should fit in.
There is something which appears to be some kind of part-stem at the 3 o'clock position.
Using tweezers I can pull it out and push it back in quite freely. A very small screw on top holds this "stem" in place. I think you can see, in ths second photo, how this "stem" attaches to the rest of the movement.
Clearly I need to attach a crown. BUT what about a stem? A stem extension? Or one of those crowns which has an extended stem-like attachment which should fix onto this current "stem" in this watch?
Yes, the watch face is somewhat scratched, and the minute hand is a little bent at the top. You may say it is not worth my while trying to get this fixed. But I just SO MUCH like this little watch and would LOVE to give it life again! It clearly IS still "alive" - though I'm not sure if it is a mechanical wind-up or an automatic. The latter of these seems to be the case - as I said earlier, a little shake and the mechanism goes and goes. PErhaps with a little oil (and lots of encouragement) it can be made good.
So my main question - what kind of stem/crown to attach and how to do it?
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This is the progress so far. The first image is the ebay seller's pic and the description was "Does not start, maybe battery but unable to confirm". In reality, it wouldn't wind, wouldn't set and the scratched up crystal looked even worse in real life (and the second hand had fallen off in the post), but I figured it had to be the twin of the one I already had, and therefore was well worth the 0.99p I bid.
Thanks for the correction regarding the movement. You are spot on with the fiddly calendar works, the first one I looked at, I launched those two springs more times than I care to mention, however forewarned is forearmed, so this one came as no surprise, and I even remembered which way round everything went without having to dig out my pictures of the first teardown. If you are aware of the issues and take care to do things very gently, the calendar works go back together reasonably easily. I did mange to gocha myself with the keyless works by pulling the crown out with the stem in the wrong position, but I knew I had been an idiot the moment I did it, so I only managed to indulge in that one screwup. The watch is running well, but I haven't attempted to adjust it yet. Beat error is around .1 to .3ms and it kept up a good pace, within 20 seconds or so over the course of the day even without me tinkering with it. I'll let the lubrication settle and do a bit more with it tomorrow. The amplitude is still a little low at around 240 fully wound, so there is scope for a little improvement in that too. The other one runs around 270, so there is no reason to think this wont. I have an almost complete spare movement, including a mainspring, etc.so if I need parts I have them. That red and gold Poljot on your "About me" page is a cracker, as are the others in your collection.