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Posted

All,

I'm currently trying to resurrect an old Tissot Antimagnetique from the late '40s and am now working with the balance.  While stripping it down I discovered that the screw slot in the rear pin on the regulator is stripped and a screw driver is useless in trying to turn it.  Is this something that should be replaced or is there a fix for it that one of you have come up with?

Thanks

George

Posted

As with most questions, a clear picture or two would help others understand exactly what are we talking about.

Posted
3 hours ago, watchweasol said:

Hi George  can you post some pictures,  cheers

Sure thing.  The picture with the single balance cock in it is the Tissot part that I have an issue with.  The image with the two parts, shows the Tissot piece on the bottom of the image.  The top part is a spare part from an AS movement that has the same type of rear reg pin with a slot in it.

Balance Cock Detail 01.jpg

Balance Cock Detail 02.jpg

Posted

It’s the “boot”. You can sometimes turn them by gripping with tweezers - some older types did not have a slot. 

Posted
On 3/22/2022 at 10:15 AM, praezis said:

I would recover the slot with a screw slot file.

Frank

If you don't have a slot file (and I don't), you can improvise by tapping a modelling knife blade against a fine file to create "teeth". It will then cut the brass.

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