Single Roller Lever Escapement with Precision Regulator

A working display model of a single roller lever escapement with precision regulator, signed Made by R. L. Gebhard, Watchmaker, 1894. The straight line lever has a club tooth escape wheel. Two arm-balance has numerous poising screws. Flat spring and swan's neck micrometer regulator.

Lever escapements were the main escapements used for watches from the 19th century on.