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Gruen 731CA Mainspring "Click" to Login or Register 
Melvin Siedman
posted
Hi All,
Does anyone know what the dimensional size of a Gruen 731CA mainspring?
Thanks Mel
 
Posts: 507 | Location: West Newton, Massachusetts USA | Registered: September 10, 2006
Bila Wirriganwalters
IHC Member 1555
posted
Is that caliber the Auto model Melvin?
 
Posts: 2264 | Location: Gladstone in Australia | Registered: January 14, 2011
Melvin Siedman
posted
Hi Bila,
Yes it is an Autowind.
Mel
 
Posts: 507 | Location: West Newton, Massachusetts USA | Registered: September 10, 2006
John Willis
IHC Member 1892
posted
Hi Mel:
I think Dennison W=4
S=10
L=12 1/2
I Think if you check listing # 114852423269 on e-bay site you might find what you are looking for,or a least someone there that might help. John
 
Posts: 361 | Location: Kincardine, Ontario in Canada | Registered: November 25, 2013
Melvin Siedman
posted
Thanks John!!!!!
 
Posts: 507 | Location: West Newton, Massachusetts USA | Registered: September 10, 2006
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