NOTES FROM THE BENCH
Clock Repair Archive - - Seth Thomas A-200:
The seth thomas a-200 movement strike mainspring is .018in strong by .682in wide ; and the
time mainspring is .014 in strong by . 682 in wide and both 96 inches long. This is the
mechanism that is used in their banjo clock of the early 1900's.The return spring on the
Seth Thomas time and strike 891m shutoff is .010in. and is usually 5 turns. Regulation on
the Seth Thomas A- 200 series movement : turn to the left for slower or to the right for
faster .4 1/3 minutes per day - 1 turn.
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