![Master Watchmaking Lesson 7](/media/uploads/2019/2/17/master-watchmaking-lesson-7.jpg)
Master Watchmaking Lesson 7
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Thomas Sweazey
A home study booklet on watch repair. Lesson 7: Selecting the Mainspring. Sectons 185-200.
A home study booklet on watch repair. Lesson 7: Selecting the Mainspring. Sectons 185-200.