Marine: Mercer Chronometers

Discussion in 'Chronometers' started by Jerry Freedman, Jul 4, 2018.

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  1. Jerry Freedman

    Jerry Freedman Registered User
    NAWCC Star Fellow NAWCC Member Sponsor

    Sep 16, 2000
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    I own #17658 which would date to about 1946. I found it in a box with only one lid. That is the way this box was
    made. It never was a two lid box. When did Mercer switch away from the traditional two lid boxes?

    I also would like to know how many jewels Mercer used.

    Jerry Freedman
  2. DeweyC

    DeweyC Registered User
    NAWCC Member

    Feb 5, 2007
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    14 jewels. Mercer went to the lidless box shortly after WWI. I used to know what year, but I am now lucky if I remember what I forgot to do yesterday.

    8 balance and ew jewels
    3 escap. jewels
    2 4th wheel jewels
    1 upper center wheel jewel

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