18th century 30-hour longcase clock alarm reinstatement

The owner of this clock wanted the mostly-missing alarm mechanism reinstated - all that was left was a setting dial, boat spring, bottom potence, and a stud for mounting the crown wheel (which had been repositioned in the past). Fortunately none of the original screw or pivot holes for the alarm components had been plugged or hidden, so it was possible to map the positions of the 10 replacement components required, and to match pivot sizes and screw threads to ensure the historical material of the clock was not altered.

There were also problems with the rest of the clock that required addressing as part of a general clean and service. A broken tooth on the escape wheel was repaired by soft soldering a new back onto the tooth and hand-filing it to match the shape of the existing teeth. The tooth breakage was likely caused by deep wear grooves in the pallets - a not-uncommon problem. The pallets were refaced with slips of hardened spring steel in order to ensure functionality and prevent future damage to the escape wheel.