UG 1205 / 65 mainspring

toastmh · Mar 31, 2025

I am trying to find a mainspring for my UG 1205 based Railrouter. It seems that this movement also shares parts with earlier calibers 64 and 65 but I cannot be sure. Info on these movements is scarce! Any advice would be greatly appreciated regarding compatibility of parts and base movements related to the 1205.

Larry S · Tues. 7:46am

T toastmh
I am trying to find a mainspring for my UG 1205 based Railrouter. It seems that this movement also shares parts with earlier calibers 64 and 65 but I cannot be sure. Info on these movements is scarce! Any advice would be greatly appreciated regarding compatibility of parts and base movements related to the 1205.

I have never needed to source a mainspring for any of the dozens of watches I’ve had repaired. Your watchmaker has the resources to obtain a compatible mainspring. If he is asking you to do this, go pick up the watch and find another service provider.

toastmh · Tues. 10:37am

Hey Larry, I am my watchmaker.

Carlton-Browne · Tues. 10:46am

Some info here

https://omegaforums.net/threads/universal-geneve-fs-the-other”-railway-watch.55668/post-2441180

but especially here thanks to perseo66

https://omegaforums.net/threads/universal-geneve-fs-the-other”-railway-watch.55668/post-2451695

toastmh · Tues. 12:16pm

Thank you kindly!

Larry S · Tues. 12:25pm

T toastmh
Hey Larry, I am my watchmaker.

Far as I know there are sources for mainsprings. Don’t have to be UG parts which are dear.

toastmh · Tues. 1:07pm

Yes for sure, I am just trying to determine the mainspring I need without having to remove the old one and measure it.

UG 1205 / 65 mainspring

toastmh

Larry S

toastmh

Carlton-Browne

toastmh

Larry S

toastmh

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