TY  - BOOK
AU  - Porter,Robert D.
TI  - A useful tool for winding and unwinding loop-end mainsprings
PY  - 2013///
CY  - [United States?]
PB  - Robert D. Porter
KW  - Clocks and watches
KW  - Design and construction
KW  - Clock and watch making
KW  - Equipment and supplies
KW  - Clock (general)
KW  - Not Geographic
KW  - The Author
KW  -    clock tools practical
KW  - Porter, Robert
KW  - Mechanics
N2  - This easy-to-make Mainspring Tool is like having a third hand for the clock maker, and makes servicing loop-end mainsprings much easier
ER  -