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GRUEN cal 450 Timer [message #15299] Wed, 28 July 2021 19:50 Go to next message
mikeo1 is currently offline  mikeo1
Messages: 2
Registered: July 2021
Gruen Apprentice
Hello All-

I am trying to restore a Gruen Chrono Timer (cal 450) and need just 1 more part-

a hammer return spring--it's at the 2 o'clock position

/vgforum/index.php?t=getfile&id=8412&private=0

/vgforum/index.php?t=getfile&id=8413&private=0


I'd certainly appreciate a hand; i'll buy a parts movement if necessary; I'd like to breath a new
life into this guy and share pics when I'm finished

THANKS-Mike
Re: GRUEN cal 450 Timer [message #15300 is a reply to message #15299] Wed, 28 July 2021 21:19 Go to previous messageGo to next message
Gary
Messages: 2108
Registered: May 2013
Location: Left Coast
Gruen Authority
Cheerleader

Mike you could try to make your own, no risk in trying...

Re: GRUEN cal 450 Timer [message #15301 is a reply to message #15300] Wed, 28 July 2021 22:17 Go to previous messageGo to next message
mikeo1 is currently offline  mikeo1
Messages: 2
Registered: July 2021
Gruen Apprentice
Hello Gary-

Thanks for your reply--Did you just offer to make the spring for me Smile?

Actually I tried to make the spring located at 7 o'clock but found that I given the length I could not get the tensile just right for correct hammer
operation-too strong button was over powered, to weak and return was partial-wound up finding one. I suspect there will be a tensile issue
on this one as well. For me proper running of chronographs always seems to be a matter of spring pressures and eccentric screw positions.

Still hoping to find one!
Re: GRUEN cal 450 Timer [message #15598 is a reply to message #15301] Wed, 06 October 2021 18:46 Go to previous message
JackW is currently offline  JackW
Messages: 1834
Registered: May 2013
Location: Denver
Gruen Authority
Head Janitor
Site Admin
This part is currently listed on eBay - https://www.ebay.com/itm/133896107271?hash=item1f2cd47507:g: c8sAAOSwSxdhXPtu

I've no connection to the seller.


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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