Titles written by Bert Hayenga:
Number of documents found: 1
- Bert Hayenga
Title: Ten Cardinal Reasons the Torsion Beat Calibrator is Here to Stay
SubTitle: [Instruction Manual for the Torsion Beat Calibrator for 400 Day Clocks]
Keywords: clock tools adjusting how-to
Other Keywords: 400Day 400 day torsion pendulum
Edition: 1998ca.
Page or pages: 5
BHM No: 12275
Use browser Back to return to previous page