Seiko 9ST1 Movement Details
Seiko calibre 9ST1 is a high grade hand winding watch movement. Production started around 2022.
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| Sub-brands: | Grand Seiko |
| Power reserve: | 72 hours |
| Accuracy: | +5/-3 seconds/day (Seiko "AA" standard) |
| Day / date? | No |
| GMT / world time? | No |
| Chronograph? | No |
| Rate: | 28,800 bph |
| Number of jewels: | 44 |
| Size / diameter: | 35.0mm |
| Height: | 7.98mm |
| Notes: | An innovative movement combining a tourbillon and a constant-force mechanism as one unit on a single axis for the first time in horological history. This movement is an evolution of cal. T0 constant-force tourbillon concept movement and first appeared in a limited edition Grand Seiko watch named "Kodo" (SLGT003). |
| Related movements: | T0 |