Two immediate possibilities.Hello there,
here is my thing with my vintage Raketa Big Zero.
I got the watch a couple weeks ago from my friend. The watch kept time pretty good, until recently. I play drums occasionally and I had Raketa with me, while I played (I just realized everything right after).
What happened, I believe, is the watch was subjected shock and since it's not a shock resistant, something happened, which resulted in gaining a 1 minute per hour.
This day is the third day of my observations. I found some instruction how to adjust it manually, but it looks it is still ahead.
The movement is: 2509HA
Could anyone advise what to do? And if it's a serious problem, how much it may cost to get it fixed.
1. It's become magnetized, perhaps you had it very close to a large speaker or amp. If this is the case it's an extremely easy fix with a cheap demagnetizer from eBay, or a watchmaker do it with theirs for a few bucks.
2. With all the percussion you've knocked the regulation arm inside the movement so it's moved too far into the fast position. This is still an easy fix, but involves a little more work.
You'll need a timing app on your phone (I would suggest Timegrapher if you have an iPhone), a clean toothpick and a steady hand to shift it back to the correct positions. There are two levers, one is for beat error, one for adjusting rate/speed (see photo), possibly both may need adjusting if you've really knocked it around.
Google regulating a mechanical watch (lots of tutorials). You want a beat error as close to 0 as possible, anything under 0.5ms is considered acceptable, and the rate again as close to 0 seconds as possible, but with an older 2609 and it's your first attempt at this anything within +/- 20 seconds per day is probably fine. The timing app on your phone will guide you as to how you're going, use small adjustments each time until you get to where you need.
Do be careful though, if you use too much force and slip and hit the hairspring you might damage it.
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