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1.
The pin-pallet escapement : adjustment and repair / by Robert Porter. by
Edition: [2nd edition].
Material type: Text Text; Format: print ; Literary form: Not fiction
Publisher: [St. Louis, Mo.] : Robert D. Porter, [1995]Copyright date: ©1995
Availability: Items available for loan: Jost Bürgi Library (1)Call number: TS548 .P67 1995.
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2.
How to make a pivot polisher and micro drilling attachment for the small lathe / by Robert D. Porter. by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publisher: [United States?] : Robert D. Porter, 2008
Availability: Items available for loan: Jost Bürgi Library (1)Call number: TS546 .P67 2008.
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3.
A useful tool for winding and unwinding loop-end mainsprings / Robert D. Porter, CMW. by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publisher: [United States?] : Robert D. Porter, 2013
Availability: Items available for loan: Jost Bürgi Library (1)Call number: TS546 .P67 2013.
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