Omega 3861 movement

Scarecrow Boat

When you say this, do you mean you wind until you feel resistance or until you feel a hard stop and can’t wind any further?

YY77

Try laying it away 24 hours in each position and wind it full everyday check the deviation, after 6 days take the average to see what is the result.

Davey2024

I wear my watch every day. The only time I take it off is when I'm in the shower, or washing the car... I wind it every day until it hits the 'stop'. It takes approx 35 - 45 turns of the crown. I measure accuracy against the atomic clock, rudimentary and basic I know, but my 3861 movement averages a + 2.2 second gain per day. It has never 'lost' time.

Hopefully this of some use.

Best regards to All.

ErichPryde

It's very likely it has something to do with the positions the watch is averaging throughout the day, perhaps some change in your routine or activities that impacts wrist position could be causing this.

The METAS rating is an average of positions, so doing what @YY77 recommended is really smart because you'll know what position you can rest it in at night that will cause it to run faster or slower. You can also use a timegrapher or Timer app to get a fair idea of each position.

The accuracy that you have is good enough that it will probably work out on its own the following weeks and months based upon what activities you are engaged in. Over the last... heck, I think I might have actually adjusted the time on my Seamaster back in June? When I compared it to my cell phone clock just now it is just under one half of a second slow, I know that in August it was probably three and a half seconds slow and a couple of weeks ago it was a second fast. I honestly don't worry about it much, because I know that it is typically within a couple of seconds of zero.


I'd say worry about it less- but you know I actually wouldn't, especially if it's your first mechanical watch. Get a feel for its accuracy and what positions it likes.

Bwoc

Thank you for the reply! Having an average of +2.2s gain per day is very accurate for a watch!
I am tracking the movement for my speedy for a week. I would say I prefer it is gaining time per day, rather than losing time.

ErichPryde

It's very likely it has something to do with the positions the watch is averaging throughout the day, perhaps some change in your routine or activities that impacts wrist position could be causing this.

The METAS rating is an average of positions, so doing what @YY77 recommended is really smart because you'll know what position you can rest it in at night that will cause it to run faster or slower. You can also use a timegrapher or Timer app to get a fair idea of each position.

The accuracy that you have is good enough that it will probably work out on its own the following weeks and months based upon what activities you are engaged in. Over the last... heck, I think I might have actually adjusted the time on my Seamaster back in June? When I compared it to my cell phone clock just now it is just under one half of a second slow, I know that in August it was probably three and a half seconds slow and a couple of weeks ago it was a second fast. I honestly don't worry about it much, because I know that it is typically within a couple of seconds of zero.


I'd say worry about it less- but you know I actually wouldn't, especially if it's your first mechanical watch. Get a feel for its accuracy and what positions it likes.