A useful tool for winding and unwinding loop-end mainsprings / Robert D. Porter, CMW.

By: Material type: TextTextPublisher: [United States?] : Robert D. Porter, 2013Description: 16 pages : illustrationsContent type:
  • still image
  • text
Media type:
  • unmediated
Carrier type:
  • volume
Subject(s): Summary: This easy-to-make Mainspring Tool is like having a third hand for the clock maker, and makes servicing loop-end mainsprings much easier.