Attach studs to watch hairsprings.
What does a Hairspring Studder do?
Attaches stud to watch hairspring preparatory to assembly to balance bridge, using studding fixture, loupe, and watchmaker’s tools: Positions stud in recess of studding fixture, using tweezers, and broaches hole in stud, using handtool. Inserts end of outer hairspring coil into hole, and forces tapered brass pin through hole to wedge spring in place, using loupe and watchmaker’s tools. Cuts off protruding ends of pin, using pliers.