Seiko 4502 Movement Details
Seiko caliber 4502 is a high grade hand winding watch movement. Production started around 1968 and production finished in 1973.
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| Sub-brands: | King Seiko |
| Day / date? | Date only |
| GMT / world time? | No |
| Chronograph? | No |
| Hacking? | Yes |
| Rate: | 36,000 bph |
| Number of jewels: | 25 |
| Size / diameter: | 27.0mm |
| Height: | 3.5mm |
| Stem code: | 354452 |
| Balance wheel code: | 310451 |
| Mainspring code: | 401450 |
| Date wheel code: | 801450 |
| Screw codes: | 012128 (stud screw), 012204, 012208, 012223, 012226, 012276, 012408, 012645, 012720 (dial screw), 012721, 012730 (case screw), 012735, 012741 |
| Development division: | Daini (Kameido, Tokyo) |
| Related movements: | 4500 4520 4522 4580 |
Videos
Articles
- Rise and Fall: The King Seiko 4502-7001 [adventuresinamateurwatchfettling.com]
- …and rise again: disaster recovery [adventuresinamateurwatchfettling.com]
- Servicing a King Seiko Hi-Beat 4502-7000 Follow-up [clocksavant.com]
- Servicing the King Seiko Hi-Beat 4502-7000 vintage watch (36000 bph) [clocksavant.com]
- Servicing a Seiko 4502-7001 and a discussion of the hack stop and quick date change mechanisms [clocksavant.com]