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Mainspring part number?

Mojofilter
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Mojofilter Member

Mojofilter

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Posted

Hello everyone -

I'm looking for a mainspring for a Bulova 11 ALACD movement.  The Cousins UK website's parts look-up shows a Generale Ressorts GR3113 part number, but then says it's for a non-automatic watch.  The 11 ALACD is an automatic watch.  Does anyone know if this part will work?  Or know of a proper mainspring for this watch?

Thanks,

- Tim

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GuyMontag Super WRT Addict

GuyMontag

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Posted (edited)

Emmywatch.com shows the mainspring for the 11AL as GR3113, and the 11AL and 11ALACD interchange for a number of parts, but not the mainspring as the 11AL isn't an automatic, but perhaps that's why Cousin's has it listed.

I measured one of my 11ALACD mainsprings and got: 1.2 x 0.1 x 360, which is very close a GR3113 (1.25 x 0.1 x 360), however the digital calipers I used have a +/- of 0.1mm, so my measurements may not be accurate.

The GR2922X is 1.2 x 0.1 x 340 and the GR2938X is 1.2 x 0.105 x 360.

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Edited by GuyMontag
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