01
Assemble and install components of timepieces to complete mechanisms, using watchmakers' tools and loupes.
02
Observe operation of timepiece parts and subassemblies to determine accuracy of movement, and to diagnose causes of defects.
03
Test operation and fit of timepiece parts and subassemblies, using electronic testing equipment, tweezers, watchmakers' tools, and loupes.
04
Replace specified parts to repair malfunctioning timepieces, using watchmakers' tools, loupes, and holding fixtures.
05
Disassemble timepieces such as watches, clocks, and chronometers so that repairs can be made.
06
Clean and lubricate timepiece parts and assemblies, using solvents, buff sticks, and oil.
07
Change timing weights on balance wheels to correct deficient timing.
08
Adjust sizes or positioning of timepiece parts to achieve specified fit or function, using calipers, fixtures, and loupes.
09
Mount hairsprings and balance wheel assemblies between jaws of truing calipers.
10
Estimate spaces between collets and first inner coils to determine if spaces are within acceptable limits.
