Rüffert, F. W.,
Katechismus der Uhrmacherkunst /
von F.W. Rüffert.
- 3e. Aufl. [3rd edition, completely renewed].
- viii, 228 pages : illustrations, plans ; 17 cm
In German.
Clock and watch making.
Clocks and watches.
Horology.
TheoryGeneral Germany Catechism Historic textbook Rüffert F.W. Timekeeper (general) textbook clock watch antique