Power reserve test on my new 3861 Speedymaster Pro.

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I doubt it. I am winding them until I feel the resistance and no more.
What resistance?

Just wind it until you cant.
 
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When the crown kicks back.
It's not fully wound until you physically can't turn the crown anymore, a full stop. A feeling of resistance or crown kick back will often occur all through the winding process.
 
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On my white one the Omega boutique manager wound it and it ran for 8 hours, I would think he knew what he was doing. And said to stop when the crown kicks back slightly.
 
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I have a question. You can't overwind an automatic, and a manual has it so you can't wind it anymore once it is fully wound.

But why not have the manual with the same barrel setup as you have in the automatic (I'm sure there's a good reason, I just don't know it).
 
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I have a question. You can't overwind an automatic, and a manual has it so you can't wind it anymore once it is fully wound.

But why not have the manual with the same barrel setup as you have in the automatic (I'm sure there's a good reason, I just don't know it).[/QUO
I wish, but I don't think it's possible.
 
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On my white one the Omega boutique manager wound it and it ran for 8 hours, I would think he knew what he was doing. And said to stop when the crown kicks back slightly.

Completely incorrect. You need to wind it until your each a hard stop - when it cannot be wound anymore.

You are not alone - the number of people who don't wind the watch fully, leading to problems like this, is actually pretty amazing.
 
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Completely incorrect. You need to wind it until your each a hard stop - when it cannot be wound anymore.

You are not alone - the number of people who don't wind the watch fully, leading to problems like this, is actually pretty amazing.
I want someone to let me try that on not my watch first.
 
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I want someone to let me try that on not my watch first.

Why?
 
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Completely incorrect. You need to wind it until your each a hard stop - when it cannot be wound anymore.

You are not alone - the number of people who don't wind the watch fully, leading to problems like this, is actually pretty amazing.
So you're saying keep going past the point where resistance starts? Seems counterintuitive as enough force will make it turn no matter what.
 
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Because I don't want to pay to fix a broken mainspring. Or two now.
It's not easy to turn it beyond the hard stop so that is not something to be scared of.
 
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So you're saying keep going past the point where resistance starts? Seems counterintuitive as enough force will make it turn no matter what.

Yes - wind it until you feel a firm stop. People have been doing this for hundreds of years mate...unless you are really special you aren't going to hurt anything.
 
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Buy yourself a cheap manual watch to practice on, if that helps. The first time I had a manual it freaked me out too, but you do get a feel for it pretty quickly. When you hit the hard stop you’ll know it. And unless you really crank it (or break out a wrench) you won’t hurt the watch. Winding may get harder and harder as you go, but when you hit the stop it simply won’t turn anymore.

And it can take many many turns before you hit that stop! I had one once with a 65-hour power reserve and a tiny crown. Charging it from empty took several minutes.
Edited:
 
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Buy yourself a cheap manual watch to practice on, if that helps. The first time I had a manual it freaked me out too, but you do get a feel for it pretty quickly. When you hit the hard stop you’ll know it. And unless you really crank it (or break out a wrench) you won’t hurt the watch.
Any suggestions on which cheap watch to get? The last manual watch I had was 50 years ago and I could overwind it easily.
 
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Imagine it wouldn’t be hard to find a new piece of junk on Amazon or an old beater on Chrono24.
 
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My new white one is off at omega because it only lasted 8 hours.
I am winding them until I feel the resistance and no more.
Omega is going to wind your watch correctly, see that it’s performing how it should, and return it to you.

Wind your crown until you hit a literal stopping point and can’t wind it any further. You’ll know when you hit it. The only way past this stopping point is to genuinely force it, which will result in breaking it. You really don’t need to purchase a practice watch for this- take your time if you need to, but wind it until you hit that stopping point. It’s that simple. These are robust watches made to be used as tools.
 
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Fear that the mainspring may break if you wind the watch until the crown reaches a hard stop means there is no answer to the power reserve of your Speedmaster. Persist in this fear, and you’ll never have the answer to power reserve. Mainsprings break, it’s a fact of life, whether you wind the watch fully, or whether you don’t. I wound my Speedmaster with the calibre 863 movement in it, yesterday. The watch was run down, and it took 60 “twists” of the crown to wind it to a full stop. It has proven to run well over 50 hours from a full wind, with the chronograph functioning all the time. Here are pictures of a broken mainspring that I replaced for a friend, several years ago. This breakage had nothing to do with how he wound the watch!

 
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Omega is going to wind your watch correctly, see that it’s performing how it should, and return it to you.

Wind your crown until you hit a literal stopping point and can’t wind it any further. You’ll know when you hit it. The only way past this stopping point is to genuinely force it, which will result in breaking it. You really don’t need to purchase a practice watch for this- take your time if you need to, but wind it until you hit that stopping point. It’s that simple. These are robust watches made to be used as tools.
TBD. I just wound past where I used to stop on my new one, 39 turns until a harder stop. I'll keep track of how long it goes now.
 
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On my white one the Omega boutique manager wound it and it ran for 8 hours, I would think he knew what he was doing. And said to stop when the crown kicks back slightly.

Typical of a store clerk who knows beans all about watches. Manual wind watches, pocket or wrist, ALL crowns will reverse a bit when released after winding, whether fully wound or only partially wound. Mechanical watches are designed to do exactly that!