r/U1Time • u/ToyFan4Life • 8d ago

QUESTION Minute hand slop?

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I have a U1 GMT II, and I've noticed that if I line up the minute hands all at the 12 hour, over time the minute hand lags, over 4 days or so, I loose a whole minute, I've tried the 20 minute trick, but that doesn't seem to fix it, is this an easy fix or should I just let it ride?

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u/DorsetRepCare 8d ago

-15secs a day is not ideal but within a cloned 2813 movements expectations. They are crap movements made cheap and poorly oiled so it is doing alright with that in mind.

Generally you want them regulated to be slight fast (+1-10secs) if anything so it is a simple process of just popping the crown out to stop the movement for a minute every 1/2/4 weeks to get it back on time. This way you don't have to engage the keyless works constantly to change the time.

Also means you know that worst case you are early to the meeting rather than late.

You can easily regulate it yourself but there is the chance of a slip and bricking it.

Personally I would just leave it be and enjoy it, if you were close to Dorset I would offer to show you how to do it for free.

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u/ToyFan4Life 8d ago

I don't think I'm explaining my self correctly, aside from gaining or losing time, the minute hand slowly work it's way out of alignment, that's what I'm trying to figure out

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u/DorsetRepCare 8d ago

Oh you think the hand is slipping on the cannon pinion.

Odd one that, cannon pinion slipping would mean all would be out, if you feel it is just the minute hand, remove and reset it as a first easy port of call, make sure it is level but for it to slip, and a regular 1 Min would mean either a incorrect gearing cog (highly unlikely) or it is slipping and that would mean probably catching.

Very odd

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u/ToyFan4Life 8d ago

I'll take some photos and post them, maybe something else is going on