Seiko 4205 Movement Details
Seiko calibre 4205 is an automatic (with hand winding) watch movement. Production started around 1976.
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| Power reserve: | 40 hours |
| Accuracy: | +55/-35 seconds/day |
| Day / date? | Date only |
| GMT / world time? | No |
| Chronograph? | No |
| Rate: | 21,600 bph |
| Number of jewels: | 17 |
| Lift angle: | 49º in 4205A & 4205B, 52º in 4205C |
| Size / diameter: | 17.2mm |
| Height: | 5.6mm |
| Development division: | Daini (Kameido, Tokyo, Japan) |
| Notes: | Used in ladies diving watches. The same as cal. 4206 but without day display (date only). |
| PDF guides: |
Technical guide
: 4205A
Technical guide : 4205B, 4206B, 4207B, 4208B, 4225A & 4227A Technical guide : 4205C, 4206C, 4207C, 4208C, 4225B & 4227B |
| Related movements: | 4206 4207 4208 |
Part Codes
| Stem code: | 351420 |
| Balance wheel code: | 310421 |
| Mainspring code: | 201420 |