Caliber 9900 slack

Hduck · Feb 17, 2020

Im curious if people notice slack and odd movement of the small seconds hand when adjusting the time while hacked? When adjusting the minute hand slightly backwards. The stopped second hand will fly back about four seconds. When the crown is advanced or pushed in, the seconds hand will jump back to its previous position.

Recently I sent it in to Omega to have it adjusted, but it did the same thing prior.

Meme-Dweller · Feb 17, 2020

Normal on most mechanical watches that can hack. And if it doesn't hack, it stops or goes backward like the Speedy.

Hduck · Feb 17, 2020

Meme-Dweller
Normal on most mechanical watches that can hack. And if it doesn't hack, it stops or goes backward like the Speedy.

I have 5 Breitlings that hack and none of them cause the small seconds hand to reverse and jump back (7750s and B01s). Likewise I have the A11 anniversary with the 3861 and it doesn’t either.

ExpiredWatchdog · Feb 17, 2020

I have two 9300's (Speedy '57 & SMPO). Neither display your symptom.

Bugbait · Feb 18, 2020

I have the 9900 movement and never noticed any slack in the running seconds hand. Then again it has been so accurate so far that I've rarely had to resync it. Will keep an eye out though.

Hduck · Feb 18, 2020

I’ll try and reproduce via a video. It is much worse when the movement is run down.

I woke my Racing up from a 3 week nap and was setting it and noticed it. I had forgotten about it as I hadn’t set it for sometime

3nicewatches · Feb 18, 2020

My DSOTM (9300) does not display the exact symptom you describe. However, when the power reserve is fully exhausted, the act of pulling out the crown to the hacking position causes the small seconds hand to flip back 3 or 4 seconds. But if the watch is still running, pulling out the crown to the hacking position does not cause any movement of the small seconds hand.

Hduck · Feb 18, 2020

3nicewatches
My DSOTM (9300) does not display the exact symptom you describe. However, when the power reserve is fully exhausted, the act of pulling out the crown to the hacking position causes the small seconds hand to flip back 3 or 4 seconds. But if the watch is still running, pulling out the crown to the hacking position does not cause any movement of the small seconds hand.

Yes! That is what I was referring to! I thought there was some abnormal slack in the train but it seems to be part of the co-axial experience.

I really appreciate it

Bimmerman77 · Feb 18, 2020

Hduck
Yes! That is what I was referring to! I thought there was some abnormal slack in the train but it seems to be part of the co-axial experience.

I really appreciate it

Not the same movement, but my AT 8900’s second hand would jump forward a few seconds when pushing the crown back in after hacking. Omega fixed it under warranty

Hduck · Feb 18, 2020

Bimmerman77
Not the same movement, but my AT 8900’s second hand would jump forward a few seconds when pushing the crown back in after hacking. Omega fixed it under warranty

My experience is much like the previous poster. The jumping tends to happen when the mainspring is almost depleted

Caliber 9900 slack

Hduck

Meme-Dweller

Hduck

ExpiredWatchdog

Bugbait

Hduck

3nicewatches

Hduck

Bimmerman77

Hduck

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