Vintage Gruen: The caliber database

Home » The Gruen Model Database » The caliber database » The caliber 707 (Guild-era movement)

Show: Today's Messages :: Polls :: Message Navigator
E-mail to friend

The caliber 707 [message #671]

Sat, 15 June 2013 16:11

JackW
Messages: 1931
Registered: May 2013
Location: Denver

Gruen Authority
Head Janitor
Site Admin

The caliber 707 is a 15 jewel movement and is 12-1/2 ligne or 28.4mm in diameter. The caliber 713 is a 7-jewel variant of this movement. Although these are commonly marked on the pillar plate with the caliber number, usually in the space between the escape wheel finger and the balance wheel, occasionally they are unmarked.
Photographs by MikeyT.
index.php?t=getfile&id=348&private=0

Attachment: Gruen+707+movement.JPG
(Size: 34.49KB, Downloaded 809 times)
Attachment: Gruen+707+movement+d.JPG
(Size: 55.74KB, Downloaded 851 times)

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

Report message to a moderator