Hairspring Havoc: A 1973 Seiko Balance Repair & Service Journey

In the horological world, magnetism is the sworn enemy of hairsprings. Join us in this Seiko 7006-7189 repair and service journey as we uncover how magnetism can wreak havoc on the delicate hairspring, causing timekeeping chaos. This repair also required manual manipulation of the hairspring to correct the terminal curve. There were other issues we found as well. Sit back and relax as we do a deep dive on this vintage Seiko.

Seiko model number: 7006-7189

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Chapters:
0:00 Intro
0:07 Inspection
04:59 Hairspring Trouble!
05:46 Balance Removal & Hairspring Repair
09:28 De-Casing / Dial & Hand Removal
12:59 Dial Side Disassembly
17:28 Rear Side Disassembly
23:52 Barrel & Mainspring Disassembly
25:30 Cleaning
27:50 Balance Jewels & Inspection
31:15 Mainspring Barrel Assembly
33:14 Automatic Works Assembly
34:29 Rear Side Assembly
43:02 Escapement Lubrication
44:09 Ballance Installation & Inspection
45:23 Timegrapher
45:57 Dial Side Assembly
55:13 Dial & Hands Installation
56:46 New Crystal & Tension Ring Swap
58:41 Casing & Final Assembly
1:02:42 Completed Watch