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E. Howard #69 Marine Clock Movement Mainspring Specifications Needed

MLSchlot

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Feb 10, 2001
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Can anyone provide me with the mainspring specifications for the "new style" movement used in the E. Howard #69 marine clock? I'm overhauling the E. Howard movement installed in a recently purchased 10" dial, Ashcroft Manufacturing deck clock.

I believe the movement is a "new style" typical of the movements used in the E. Howard #69 marine clock. This is the first E. Howard Marine movement I've ever worked on, but I question the mainspring installed in this clock. It looks to have been cut down and the barrel latch hole repunched. Actually, the entire spring looks to have been hand made and not the quality I would expect to see in an E. Howard & Co. movement.

The movement as found wasn't in too bad of shape. Just totally gummed up from years of neglect. After a thorough cleaning and test assembly, I haven't encountered any existing bushing wear in the plates. Although, several bushings had been replaced in the past. I've worked on a lot of Chelsea marine clocks and based on my experience with those movements, I'm worried that the mainspring currently installed in this clock is too strong for the E. Howard movement. Any information is most appreciated.
 

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