Hacking 1861 speedy

speedygrail · Aug 24, 2020

I realize this is covered in the 1861 manual, specifically mentioning if you want to sync time, you can basically stop the second hand with pulling the crown using back pressure until it stops.

My question is, is this bad for the movement? Sometimes when you do this, it appears the seconds is going backwards slightly, which I know can be bad. Do you do this? I know some say, if you want accuracy, get a quartz and just set it to the closest minute and enjoy it......

AAAKK · Aug 24, 2020

Al gives some good info here

https://omegaforums.net/threads/fro...-then-set-or-the-reverse.106728/#post-1398005

Cenzo · Aug 24, 2020

It's going to run about 6-12 seconds fast a day, so I don't bother getting it exactly right when I set the time. 😀

toolr · Aug 24, 2020

The note in the new manual 1/24 doesn't mention using backwards force on crown to stop the seconds. Here is the note now.

"Note: calibres 321,1861,1863,1866 and 1869 do not have a 'stop-second' mechanism. Therefore, it is not possible to synchronise the watch to the pip."

antonmarkov · Feb 7, 2025

T toolr
The note in the new manual 1/24 doesn't mention using backwards force on crown to stop the seconds. Here is the note now.

"Note: calibres 321,1861,1863,1866 and 1869 do not have a 'stop-second' mechanism. Therefore, it is not possible to synchronise the watch to the pip."

The manual actually says:

“Note: calibres 1861, 1863, 1866 and 3604 do not have a stop-second mechanism. To synchronise, the crown should be gently turned backwards and pressure maintained to stop the seconds hand. Release when the display corresponds to the timing signal and push crown back to position 1.” So you can actually stop the seconds hand. Mine runs precisely 14 seconds fast every day which is amazing to me. I still prefer to set it this way otherwise it bothers me. If you haven’t tried it yet, please do.

watch_my_six · Feb 7, 2025

A antonmarkov
The manual actually says:

“Note: calibres 1861, 1863, 1866 and 3604 do not have a stop-second mechanism. To synchronise, the crown should be gently turned backwards and pressure maintained to stop the seconds hand. Release when the display corresponds to the timing signal and push crown back to position 1.” So you can actually stop the seconds hand. Mine runs precisely 14 seconds fast every day which is amazing to me. I still prefer to set it this way otherwise it bothers me. If you haven’t tried it yet, please do.

Is this thus considered "safe" for all movements, automatic or not, chronograph or not?

antonmarkov · Feb 7, 2025

watch_my_six
Is this thus considered "safe" for all movements, automatic or not, chronograph or not?

I think that it is, considering they included it as a feature in the manual. I can’t speak for other models but they wouldn’t include something that would cause considerable wear.

DoctorEvil · Feb 7, 2025

A antonmarkov
The manual actually says:

“Note: calibres 1861, 1863, 1866 and 3604 do not have a stop-second mechanism. To synchronise, the crown should be gently turned backwards and pressure maintained to stop the seconds hand. Release when the display corresponds to the timing signal and push crown back to position 1.” So you can actually stop the seconds hand. Mine runs precisely 14 seconds fast every day which is amazing to me. I still prefer to set it this way otherwise it bothers me. If you haven’t tried it yet, please do.

I back hack my Speedy FOIS with Cal 1861 like this. I was initially a bit reluctant in case it put excessive strain on the parts but my watch continues to run fine.

I've seen this text in older editions of the red Owners Instructions book too. On the Omega website, when Speedmasters used to have the Cal 1861, it used to say what @toolr mentioned (that those calibers did not have a "stop second" mechanism and therefore could not be synchronised).

Your watch movement seems to be running a bit fast. If memory serves me correct, it should be between -1 to +11 seconds per day, so you may need to get your watch serviced or re-regulated.

Hacking 1861 speedy

speedygrail

AAAKK

Cenzo

toolr

antonmarkov

watch_my_six

antonmarkov

DoctorEvil

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