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The caliber 330 [message #669] Sat, 15 June 2013 15:54 Go to next message
JackW is currently offline  JackW
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The caliber 330 is 17 jewels and is 7-3/4 x 11 ligne or 17.2mm x 24.81mm. It is the second Curvex movement that was produced by Gruen. This caliber is usually marked with the number next to the mainspring barrel on the exposed underside of the top plate.
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All I know is based on hard work & writing by others. I can only aspire to augment this body of knowledge. If I am wrong it is because of my own failings. -me

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[Updated on: Mon, 17 June 2013 02:55]

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Re: The caliber 330 [message #1029 is a reply to message #669] Thu, 11 July 2013 11:55 Go to previous messageGo to next message
Thojil is currently offline  Thojil
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Interesting detail is that the 330 was initially produced with a single center bridge. Gruen changed to a split layout with separate escape wheel cock apparently in the fall of 1938 to improve serviceability (information I recall having from Cary).

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Re: The caliber 330 [message #1032 is a reply to message #1029] Thu, 11 July 2013 15:17 Go to previous message
JackW is currently offline  JackW
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Thanks! I'd forgotten about this too.

All I know is based on hard work & writing by others. I can only aspire to augment this body of knowledge. If I am wrong it is because of my own failings. -me

"If I have seen farther it is by standing on the shoulders of giants." - Newton
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