Job Description:

• 1) Operates vertical- or horizontal-drill press to countersink drilled holes in watch parts: Places part in bed or chuck of press.

• 2) Aligns countersinking bit and hole, using loupe, and advances bit manually to automatic stop device.

• 3) Removes part from press and measures depth of countersink, using precision dial gauge.

• 4) May countersink screw holes around periphery of balance wheels and be designated Countersinker, Balance Screw Hole.