Seiko 7S36 Movement Details
Seiko caliber 7S36 is an automatic watch movement. Production started around 1996.
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| Sub-brands: | Seiko 5 |
| Power reserve: | 41 hours |
| Accuracy: | +45/-35 seconds/day |
| Day / date? | Day + date |
| GMT / world time? | No |
| Chronograph? | No |
| Hacking? | No |
| Rate: | 21,600 bph |
| Number of jewels: | 23 |
| Lift angle: | 53º |
| Size / diameter: | 27.0mm |
| Height: | 4.9mm |
| Balance wheel code: | 310020, 310197 |
| Mainspring code: | 201024, 201075, 201083 |
| Date wheel code: | 878206 (black on white), 878207 (white on black), 878280 (black on white), 878281 (white on black) |
| Screw codes: | 012123 (stud screw), 012168, 012277, 012354, 012420, 012539 (second reduction wheel screw), 012919 (ratchet wheel screw), 016705 |
| Notes: | The difference between the 7S36 and cal. 7S26 is the addition of a lower bridge for third wheel and pinion in the 7S36, which gives it two extra jewels. The increased jewel count might imply better performance and accuracy but in reality there's probably little or no difference. Note that the date wheel used for 7S36A and 7S36B is not compatible with 7S36C. |
| PDF guides: |
Instruction manual (English)
Technical guide
: 7S26A & 7S36A
Instruction manual (English & Japanese) Instruction manual for diver's watch (English) Technical guide : 7S26B & 7S36B Technical guide : 7S26C & 7S36C |
| Related movements: | 7S25 7S26 7S35 7S55 |
Videos
Articles
- Automatic Watches-Seiko 7s36b [watchmakingjourney.com]
- Variations on a theme [adventuresinamateurwatchfettling.com]
- Seiko NH36 Walkthrough [watchrepairtalk.com]