They're an indestructible movement. They don't even use a PCB, which is great as it's one less point of failure.

They're a really rewarding movement to work on. I recommend them to people wanting to get into tinkering as they are relatively simple, cheap, you still get a complex calendar, and if you can handle that, a 6309 or similar won't be a massive step forward. There's also parts around and if you can't find the parts, you can usually get another movement. Pulsar made a copy of it as well which is 100% interchangeable, I forget the caliber number, I'm sure someone will chime in with it.

@@hal0eight I think it might be the Pulsar Y513/Y514 series but I'm not sure.

That's easy, the entire calendar side interchanges, that's it.

No worries, glad it was useful for you

Trimmer, gain or loss on the timing. Tricky to adjust accurately without a quartz timing machine though

@@hal0eight Tank you. Might give it a go

It really depends where the trimmer is set to already. I don't remember which direction it is because I always do it on a Flashtest or QT-77. As the trimmer is so sensitive and just takes a whisker to change, I wouldn't try it without diagnostic equipment.

Until the quartz crystal cracks. That could be 10 years, it could be 2000.

Yes. In any case, this was a scrap movement so I wasn't terribly careful. But a good example of how careful you need to be around coils.

@@hal0eight I'm glad it was a scrap movement. I cringed when it happened, lol.

@@watchnut5305 Except for the rare stuff I pull apart here, everything else is scrap movements, which is why the rarer stuff is done a bit slower.

Good question. First step would be to get the movement on a pulse checker and make sure you get a pulse and to check the coil for resistance and continuity. You probably have 2 bad parts.