Recently serviced cal. 562 movement issue

Hi! I'm hoping to get some advice on how to handle an issue that occurs in my SMDV ref. 7161 cal. 562 movement. Problem is that the movement completely stops while adjusting the time backwards. By stopping I mean, that the watch stops ticking. The hands move freely and without resistance going backwards. Time should be possible to adjust backwards freely as this movement has semi quick-set date function which requires this.

First problems started to occur AFTER full service by a Omega certified watchmaker in January 2025. Here's a video of the original problem which I thought was just that the hands somehow interact with each other:

I took the watch back to the watchmarker after noticing this. He said that the seconds hands center hole was worn and this would cause the seconds hands to sit deep thus contacting the minute hand. To fix this he suggested to buy new hands to which I agreed. He ordered new hands and I left the watch to be fixed. When picking it up in, I tried to adjust the time backwards and noticed again that the seconds hand follows the minute hand and also comes to a complete stop while holding pressure on the crown. Now the watchmaker told me that this is completely normal and kind of a trick to hack the seconds which usually just keeps going. This watchmaker is considered to be some kind of guru on local watch collector forum and talking with him I have no doubt that he is fully competent and this being my first time taking any watch to be serviced what the hell do I know so I take his word.

Since then I have followed the daily timekeeping regularly and it's consistantly about -20 sec per d. I don't have timegrapher so I can't say any more to that. Also later I thought of to listen to the watch when the seconds hand stops - to my suprise the watch stopped ticking completely! I have tried to look for anwsers to this from the forums but haven't found anything. The so called braking I have found out to be a thing but this can't be ok, is it? I don't want to go complaining (again) to the watchmaker before I ask the knowlegeable members here. As always, any help very appreciated. Thank you in advance.

Thank you for this information @Canuck , I had no idea this is how it's supposed to behave. This is my first vintage watch and I got to thinking that the way it worked before service was the correct way. So is this how the type of movement behaved as new from the factory back in the 60's? For the future should I regard this to be correct for all non-quick set movements with independent seconds hand?

Just curious.. what the unlikely harm could be if any? Is there some concern here..?

Ok, thanks for the information! I'll talk about this more with the watchmaker when I take it back to see what is wrong with the timekeeping. There have been so many other issues with the service that I'm glad this is not a problem.

Ever heard of backhacking?

That's what you are doing.

Yeah, never came across that with all the time spent here. I had the watch for two years without that happening so I was suprised about it after service. This is my first vintage watch and I have a lot to learn. Thanks for confirming and also for giving the correct term for this 👍 I found way more information googling "backhacking" than I did with my previous searches.

Exactly, completely normal.
When setting the time (in either direction), the friction-fit cannon pinion slips on the centre wheel. This friction can effectively stop the centre wheel and consequently stop the movement (the whole wheel train) . That's not a problem. Normal/modern hacking stops the balance wheel - not so different.
The slight backwards jump of the seconds hand is also normal for movements with indirect centre seconds with a friction spring (such as the cal 562).
Don't worry and enjoy it.