Präzisionspendeluhren in Deutschland von 1730 bis 1940 Volume 1
Author: Jürgen Ermert
603 pages, 1373 illustrations many in colour
This is a very well researched book containing a wealth of information about precision pendulum regulators, all well illustrated. The book will repay careful study even if you do not read German. We have German/English horological dictionaries in stock by Berner and also by Mauch.
To understand the breadth of information see the Table of Contents.