Dumb obsvervation on Hamilton 16s

Discussion in 'American Pocket Watches' started by DeweyC, Jul 11, 2018.

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  1. DeweyC

    DeweyC Registered User
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    Feb 5, 2007
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    OK, I know I should have known this for at least 20 years. But I just realized Hamilton used a safety pinion on the center wheel. In fact, this came about because I decided to service my 963. So they did this early on.

    Did Hamilton ever advertise this?

    Thanks and regards,

    Dewey
     
  2. Tom McIntyre

    Tom McIntyre Technical Admin
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    I suspect it was a given by the time Hamilton started making watches, so there was no advantage in claiming it. The reason it took as long as it did to spread was that Robbins & Avery owned both the Burt and Fogg variants of the feature and threatened anyone who tried to use either a screw or friction fit release.
     
  3. Bob McClelland

    Bob McClelland Registered User
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    Jun 29, 2010
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    All of the Hamilton 18 size models (including the 7 & 11J ones) had the movements marked "SAFETY PINION" on the plate around the center wheel. They apparently didn't continue doing this on the 16 size watches.
     

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