Notebook "Der Chronometergang"
sold
Notebook „Der Chronometergang“
from Professor Alois Irk
(Director of the federal school for watch-industry in Karlstein)
1923, Berlin, Verlag der Deutschen Uhrmacher-Zeitung
Notebook in red carton, 86 pages
about the types of escapement, his historical development,
the construction.
with 26 Original-drawings in text and on 2 tableaus
Diameter: approx. 15cm broad, approx. 22cm high
sold