A professional who operates bench-polishing machine to remove scratches and burrs and to impart polished finish to watch pinion teeth. Responsibilities include:

• Positions pinion in machine holder, using tweezers.
• Depresses pedal to engage lapping wheel and holds abrasive and polishing compound against rotating wheel to dress wheel.
• Presses machine lever to lower and hold lapping wheel against pinion to remove defects and polish pinion teeth.
• Releases pedal to stop machine after prescribed period and raises lever to gain access to polished pinion.
• Depresses pedal of hot air device to melt polishing compound adhered to pinion and to blow pinion into container.
• Mounts pinion in holding calipers and cleans pinion, using electric brush and cleaning compound.
• Examines and measures cleaned pinions to verify specified finish and dimensional specifications, using loupe and precision gauges.