Elgin Elginite Hairspring
The Elginite hairspring is made from tested hairspring alloy developed by the Elgin Industrial Fellowship at Battelle Memorial Institute in cooperation with the Research Department… Read More »Elgin Elginite Hairspring
Hairspring
The Flat Hairspring
There is a characteristic present in a flat hairspring as it vibrates, i.e., winds and unwinds, that causes the coils to bunch together first on… Read More »The Flat Hairspring
The Breguet or Overcoil Hairspring
The idea for the overcoil came from the horologist Breguet who reasoned that if the outer coil of a flat hairspring was bent uo and… Read More »The Breguet or Overcoil Hairspring