Bentima Star Hands Stop Moving

[stebass1]

Dear Forum

I have a Bentima star watch as pictured, mechanical wind with calendar date.

It has recently been serviced with a new stem and crown. However, after winding and setting, after a few hours the hands stop moving, even though the watch is still running. I guess that it is just a case of adjustment?

Any advice would be gratefully received on how to rectify this.

Look forward to hearing from you.

Steven

[anilv]

Dear Steven,

A watch which runs but hands dont move is usually caused by a loose canon pinion. A simple enough part to access but involves 'crimping' the canon pinion and if not done correctly will end up damaging the part. One way to identify if this is the cause is to see how much resistance is encountered as you set the hands. If there is minimal or no resistance then its a good bet the canon pinion is loose.

BTW, how do you know the watch is still running as this watch has no seconds hand?

If you hear it ticking it could be that when you picked up the movement , that was enough to set it off.

I would take it back to the guy who 'serviced' it last!

Anil

[Marc]

Hi Steven,

 

If the movement is running but the hands don't move then the two most likely causes are probably;

1. Missing dial washer.

2. Loose canon pinion.

If the dial washer is missing then the minute wheel can lift and could loose drive. This would be easy to remedy by removing the hands and dial and installing the missing washer.

If the canon pinion is too loose then although not a difficult job I would not suggest that it's sensible to try it as your first fix.

To be fair though, if the watch has been recently serviced then both of these faults should have been addressed. If you paid to have the work done professionally then I would say that a chat with the watch maker might be the best route to start with.

[bobm12]

Hi Steven,

 

Although not as seasoned in this hobby, I concur wholeheartedly with the advise give here. Good and experienced advise, by the way....and definitely talk to whoever serviced the watch!

 

Cheers,

 

Bob

[stebass1]

Thank you all on the above. Unfortunately, the people who serviced the watch were a nightmare and had the watch for over 4 months and when I got it back it was in this state, so I do not trust them and do not want them to have the watch back at all.

Will look into the canon pinion, and see if I can resolve this myself.

Appreciate your expertise and advice as always.

Regards

Steven