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Speedmaster Pro Cal. 3861 - Seconds hand move when setting time

T
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Hi guys,

As you will probably be able to tell from this post, I am new to the wonderful world of horology, and finally bought myself an Omega Speedmaster Professional Moonwatch caliber 3861. So do excuse this newbie post!

Reaching out here because I noticed that the seconds hand moves a little when I’m setting the time (forwards when rotating the crown clockwise, and backwards when rotating anti-clockwise).

I understand that with the new cal. 3861, it is a hacking movement and the seconds hand should be static when setting the time.

Is this a normal observation? Or am i holding on to a defective piece? For what it’s worth, I notice that this happens only when I’m setting the time BEFORE winding. If I do a full wind first before setting the time, the seconds hand does stay still as I’m rotating the crown to set the time.

Thanks in advance for understanding this newbie paranoia!
 
AEC
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Can you be a more specific than "moves a little"? For example, does the seconds hand continue moving as long as you twist the crown to set the time, or does it just wiggle a bit in one direction or the other? How quickly and far does it move while you twist the crown? I think if you can describe the symptom in more detail then members here will provide opinions.
 
Caliber561
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Sounds like simple lashing in gear systems. Happens to all watches, from independents, Journe, all the way to Miyota. A little bit of moving back and forth while rotating the crown is fine while hacked.
 
C
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T tenthcircle
Hi guys,

As you will probably be able to tell from this post, I am new to the wonderful world of horology, and finally bought myself an Omega Speedmaster Professional Moonwatch caliber 3861. So do excuse this newbie post!

Reaching out here because I noticed that the seconds hand moves a little when I’m setting the time (forwards when rotating the crown clockwise, and backwards when rotating anti-clockwise).

I understand that with the new cal. 3861, it is a hacking movement and the seconds hand should be static when setting the time.

Is this a normal observation? Or am i holding on to a defective piece? For what it’s worth, I notice that this happens only when I’m setting the time BEFORE winding. If I do a full wind first before setting the time, the seconds hand does stay still as I’m rotating the crown to set the time.

Thanks in advance for understanding this newbie paranoia!
Hi
I have noted exactly the same on my watch same caliber as yours (moonwatch speedmaster 3861)
The seconds hand jerks of 1sec displacement (i.e. it jumps of 1sec before recovering the initial position) and in the backward direction only when setting the time counter clockwise. No jerk/jump when setting clockwise.
After several crowns rotations (and jerks if counter clockwise crown rotation) the seconds hand is always in the same position.
This happens to me even with a fully wound watch

this is finally Fine to set the time but can this be a wearing mechanism to the watch?

i am a newbie too and your advises are more than welcome please

thanks a lot

emanuele
Edited:
 
YY77
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C Califfo
Hi
I have noted exactly the same on my watch same caliber as yours (moonwatch speedmaster 3861)
The seconds hand jerks of 1sec displacement (i.e. it jumps of 1sec before recovering the initial position) and in the backward direction only when setting the time counter clockwise. No jerk/jump when setting clockwise.
After several crowns rotations (and jerks if counter clockwise crown rotation) the seconds hand is always in the same position.
This happens to me even with a fully wound watch

this is finally Fine to set the time but can this be a wearing mechanism to the watch?

i am a newbie too and your advises are more than welcome please

thanks a lot

emanuele
Uhmm, don't think you'll get an answer from a one time poster whom didn't even came back to read the replies.

Screenshot_20230912-000225~2.png
 
Archer
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It’s backlash...nothing to be concerned about.
 
GrouchoM
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I'm not familiar with this. I don't get it on my Blancpain f385 movement and my 1861 isn't hacking. Since I'm probably going to get a 3861, it's good to know in advance. Specifically, what's happening?
 
C
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Archer Archer
It’s backlash...nothing to be concerned about.
Fully normal then with no risk to induce a wear over time? no need to send for repair please?
It is brand flamant new,,,,,,
Thanks a lot for your reply and help
Edited:
 
YY77
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Archer Archer
nothing to be concerned about.

C Califfo
Fully normal then with no risk to induce a wear over time? no need to send for repair please?

👎
 
YY77
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C Califfo
Not normal then?
Can you please be more explicit?
Thanks a lot
An Omega qualified watchmaker told you what it is called and said you don't have to be concerned, but it seems you're still concerned.
 
C
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YY77 YY77
An Omega qualified watchmaker told you what it is called and said you don't have to be concerned, but it seems you're still concerned.
Ah sorry…but I misinterpreted your thumbsdown

i thought with respect to the tech response of the kind expert whereas i rather understand that it was addressed to my reaction correct?
 
YY77
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C Califfo
Ah sorry…but I misinterpreted your thumbsdown

i thought with respect to the tech response of the kind expert whereas i rather understand that it was addressed to my reaction correct?
Sorry, until now I always thought that was the headscratching emoji. Yes to your question.
 
Archer
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C Califfo
Fully normal then with no risk to induce a wear over time? no need to send for repair please?
It is brand flamant new,,,,,,
Thanks a lot for your reply and help

Gears have backlash - doesn't matter if it's new or not. This is completely normal.
 
watchyouwant
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C Califfo
Ah sorry…but I misinterpreted your thumbsdown

i thought with respect to the tech response of the kind expert whereas i rather understand that it was addressed to my reaction correct?

Just listen to the advice, relax and enjoy. If you don't want to listen, go to a Watchmaker, pay for the advice and relax after that.
 
C
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Archer Archer
Gears have backlash - doesn't matter if it's new or not. This is completely normal.
Thanks a lot, sincerely 😀
 
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