Engel, Christian,
Die Entwicklungsmoeglichkeiten der schweizerischen Ankeruhretablisseurs /
Christian Engel.
- 115 pages ; 21 cm
Clocks and watches making--Switzerland.
Clock and watch industry--Switzerland.
Clocks and watches--Escapements.
industry prospects Vogt Schild Verlag Engel, Christian Watch (general)
Academic thesis.