Since you guys don't seem to mind the spam I'll post a quick update
I did a full service on the movement today - disassembly, cleaning (in 99% IPA with a brush, dried in a food dehydrator at 40C), oil, reassembly.
I even did the balance jewels and holy shit that is stressful. I pinged the jewel and the holder so many times, but somehow they only wanted to fly a few inches so I never lost them.
The top one was quite greasy, so dipping it in alcohol didn't do the trick. I buffed it on some paper and that gave it the mirror shine I was looking for
Lubricating these things is hard.. The cap jewel is about 1.3 mm wide, and you have to hit it with enough oil to cover about 50% of the total area - do the math lol. And it has to stay right in the middle. If it travels to the edge, you have to start over. I saw somewhere that ironically, bigger tweezers hold onto these things better. I have some cheaper 00 size coming, so I'll give it a go. If it feels better, I might have to get some good ones in that size too.
This is all done with a shitty loupe fogging up every 2 minutes. I have to use my air blower to clear it up when it does. I can't stand that thing, and I will need to find a better solution asap. Microscopes are about $120 on Taobao for what looks like the same sold unbranded on watch repair sites. Might need to fit that into the budget sooner rather than later. I also read that you can cut vents into your loupe which can help with the fogging, so I'll give that a look in the meantime. I feel like my sweaty head might be too much for it though
It took a long time but I got them together and the watch is running
The service helped tighten the timings quite a bit - beat error is down to 0.1ms, and it does a better job of holding a steady rate throughout all positions (delta is like 4 seconds but I won't know until tomorrow for more complete results). The amplitude did not improve yet though, so the mainspring itself may be weak.
New problem though - when running dial up, the movement stops after about 20 minutes! Last time it happened I gave the center wheel a little poke through the jewel with some pegwood, and that seems to have knocked it loose. (edit 3 hours later: Since doing this, the watch has not stopped again). I believe this is the "Asia" seconds wheel that came with my watch, rather than the one I filed down and ruined the other jewel with. I'll give that other wheel a try later, maybe after making sure the filed pivot is nice and smooth first, with this stupid loupe
Morning Edit: Watch is still running well this morning! Even better now that the oils have settled in
