Seiko 6139- repairing the damage hairspring.
22:56
Hairspring straightening 101
47:01
15-Year-Old Found This (Really Nice) Watch at a Flea Market
58:17
A Battered Seiko 5 Restoration: Power Tools Required!
13:06
Removing the Etachron Hairspring Stud: Tips and Tricks
9:27
How to repair a twisted hairspring. Watch repair techniques
16:47
Hair Spring Straightening (1974)
20:30
Assembly and Disassembly of Seiko 6309A
12:04