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spiro13

ETA Running Problem

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Hi

I have a ETA 2801-2 that runs reasonably well when it is on a full wind : Amplitude-232,  Beat error - 1.0, Rate- +10sec.  with the regulator in the central position. After appx. 15 hours the numbers are as follows: Amplitude-198, Beatt Error-2.5, Rate- +30sec. I would appreciate suggestions as to what might be the problem. I'm thinking maybe it is a Mainspring problem.

Thank you,

Tony

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29 minutes ago, spiro13 said:

Hi

I have a ETA 2801-2 that runs reasonably well when it is on a full wind : Amplitude-232,  Beat error - 1.0, Rate- +10sec.  with the regulator in the central position. After appx. 15 hours the numbers are as follows: Amplitude-198, Beatt Error-2.5, Rate- +30sec. I would appreciate suggestions as to what might be the problem. I'm thinking maybe it is a Mainspring problem.

Thank you,

Tony

Tony,

 

It likely just needs a service and new mainspring. That amplitude is on the lower side.

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I too agree with the others. A service, a new mainspring and regulating it would likely get your watch in perfect order. For a top notch modern movement like your ETA calibre 2801-2 the B.E. shouldn't be more than about 0.3 ms.

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