Vintage Gruen
The forum for Gruen watch enthusiasts

Home » General Talk, Buying and Selling » Open Discussions » Gruen 460 Auto Bumper (Power reserve)
Gruen 460 Auto Bumper [message #5328] Wed, 25 March 2015 00:44 Go to previous message
Timeticker is currently offline  Timeticker
Messages: 552
Registered: June 2013
Location: Somewhere in the world
Gruen Master
Soooo, whilst restoring a 460 bumper, I ran in to a bit of a quandry! Posted next are the questions "bumping" me!

1.) What is the power reserve for a bumper? Meaning, being that you really can't wind it like a conventional watch in that it has a bridle to keep it from being over wound, then how long should it last?

2.) Installed new mainspring, the watch started perfectly, and keeps excellent time, but on first attempt, watch ran for 6 hours and shut down.

3.) Re-wound the watch, but it would seem to me that the auto bumper should be keeping the watch running while you're wearing it, and should keep running throughout the night when the watch is off the wrist.

4.) Any comments are more than welcome.....please feel free to pitch in your 2 cents, dollars worth, or a brick through my window.


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

Love them anyway.
A "Paradoxical Commandment"

[Updated on: Wed, 25 March 2015 00:44]

Report message to a moderator

 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: P.T. Barnum
Next Topic: caliber database
Goto Forum:
  


Current Time: Wed Nov 21 02:24:46 UTC 2018

Total time taken to generate the page: 0.06670 seconds