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mr. mike · 9 March 2010, 07:38 AM

Hi,
I have a Precision 6694 that loses about 5 minutes per day if not worn. However, if I wear it, it seems to run just fine. Any ideas?
Mike

JEC · 9 March 2010, 11:16 AM

I'd guess a mainspring issue. When worn, the mainspring is kept at a constant tension (near full) which is ideal for timekeeping. Usually you can expect to lose a few SECONDS when the mainspring winds down, but minutes would indicate that the mainspring is probably worn out and slackening.

Experts please chime in if I'm wrong.

9 March 2010, 07:38 AM	#1
mr. mike "TRF" Member Join Date: Mar 2010 Location: florida Posts: 15	Precision 6694 Runs Slow Hi, I have a Precision 6694 that loses about 5 minutes per day if not worn. However, if I wear it, it seems to run just fine. Any ideas? Mike

9 March 2010, 11:16 AM	#2
JEC Member Join Date: Feb 2010 Real Name: J. Location: Montreal Watch: Speedmaster Pro Posts: 232	I'd guess a mainspring issue. When worn, the mainspring is kept at a constant tension (near full) which is ideal for timekeeping. Usually you can expect to lose a few SECONDS when the mainspring winds down, but minutes would indicate that the mainspring is probably worn out and slackening. Experts please chime in if I'm wrong.

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