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Gruen 431 [message #2411] Wed, 18 December 2013 22:38 Go to next message
Timeticker is currently offline  Timeticker
Messages: 504
Registered: June 2013
Location: Somewhere in the world
Gruen Master
Does anyone have a mainspring for a 431? Rolling Eyes

People you thought were your best friends will stab you in the back to your face!

Love them anyway.
A "Paradoxical Commandment"
Re: Gruen 431 [message #2413 is a reply to message #2411] Wed, 18 December 2013 23:36 Go to previous message
GaryM is currently offline  GaryM
Messages: 1188
Registered: May 2013
Location: Seattle
Gruen Authority

Tomas, The 448 material catalog says 430-439 are interchangeable with the 431. Jules Borel doesn't list it but they do have 440 springs in stock.

430-431-435-440 size 1.15 x .11 1/4 x 235

Jules list the 440 spring size, 1.20 x .11 x 240

Close enough for government work.

It has nothing to do with my watch collection, it is the people I share my watch collection with that matters.
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