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Re: Gruen 460 Auto Bumper [message #5329 is a reply to message #5328] Wed, 25 March 2015 01:44 Go to previous messageGo to previous message
GaryM is currently offline  GaryM
Messages: 1261
Registered: May 2013
Location: Seattle
Gruen Authority
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Out of the Gruen course in wristwatch repair, the New Gruen Auto-wind technical bulletin states: "The complete winding will be executed through the natural movements of the arm in 3 to 4 hours' time-". "Once thoroughly wound the watch is provided with a power reserve of approximately 32-35 hours' running time."

There are some really good testing scenarios for auto-winds in this book, too much to type out here.

Hope that helps.


Aqualung, my friend, don't you start away uneasy You poor old sod, you see it's only me
 
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