Seth Thomas A-200 (repair hints)

Clock Repair Archive – –    
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.