Thomas Sweazey, Byron Sweazy - Master Watchmaking Lesson 7
Chicago School of Watchmaking | 1961 | ISBN: N/A | English | 20 pages | PDF | 8.2 MB
Chicago School of Watchmaking | 1961 | ISBN: N/A | English | 20 pages | PDF | 8.2 MB
A home study booklet on watch repair. Lesson 7: Selecting the Mainspring. Sectons 185-200.