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Correcting Pocket Watch Beat Error, a practical look


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Hi guys. Yesterday I dove head into correcting the massive 7ms beat error on a 23 Jewel Elgin Veritas Pocket Watch. I examined the jewel location without removing any plates or the palate fork and used the arm of the palate fork as a reference to find the banking pins Centre and the delta from that center to where the impulse pin was, at rest. Taking note of the delta, I then safely disassembled the balance from the bridge and worked on rotating the hairspring collet 5 degrees counter clockwise; to effectively move the impulse jewel 5 degrees in the clockwise direction. I then reassembled the movement and tested the watch with 3 different software application; eTimer, Swiss Connect and Timegrapher. The results were good as I got the relative beat error inside 1ms. I made a one hour video showing all the work. Here you go, please enjoy.

 

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