| Re: Gruen Autowind Bumper 462SS [message #19245 is a reply to message #19243] |
Sat, 25 January 2025 01:41  |
klevay
Messages: 3
Registered: January 2025
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Gruen Apprentice |
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Hi Jenneke,
I have all the necessary equipment, but there's no point in using a timegrapher when the watch balance is barely moving. The mainspring was in unopened, sealed wrapping. I didn’t measure it, but I tend to agree with the suggestion that the vintage blue spring might have lost its strength because I can’t find any other reason for such behavior. The train runs freely as far as I can tell, with several backward revolutions of the escape wheel at the end. All side shakes and end shakes appear to be within acceptable range.
Thank you for welcoming me to this forum.
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