https://www.ebooknetworking.net/books_detail-1849020345.html

WATCH AND CLOCK ESCAPEMENTS A Complete Study In Theory and Practice of the Lever, Cylinder and Chronometer Escapements, Together with a Brief Account ... and Evolution of the Escapement in Horology

Name: WATCH AND CLOCK ESCAPEMENTS A Complete Study In Theory and Practice of the Lever, Cylinder and Chronometer Escapements, Together with a Brief Account ... and Evolution of the Escapement in Horology
Author: Keystone
ISBN: 9781849020343