| Manufacturer | Seiko Epson |
| Caliber Number | YN71 |
| Movement Type | Automatic, self-winding mechanical |
| Diameter | Unconfirmed |
| Height | Unconfirmed |
| Jewels | 22 |
| Beat Rate | 21,600 vph |
| Lift Angle | Unconfirmed |
| Power Reserve | ~40 hours |
| Accuracy Rating | -35/+45 seconds/day |
| Hand-Windable? | Unconfirmed |
| Anti-Shock Device | Diashock |
| Hand Count | 3 |
| Functions | Central hours; central minutes; central sweeping seconds; open balance at 9:00 |
| Hacking Seconds? | Unconfirmed |
| Country of Manufacture | Japan |
| Known Models | S-Meister Watches on Kickstarter (Rainjin SM-OGBK-G-KS, Fujin SM-DVBK-P-KS, Miyabi SM-RDSV-S-KS), Baroque Eternita (Add your watch to the comments below…) |
The Seiko Epson caliber Yn71 is an affordable automatic movement with an open balance wheel at 9:00.
There is almost no information about this movement anywhere online, other than a Kickstarter brand called S-Meister that is using the YN71 in their watches.
If you get your hands on one, please help fill in the unconfirmed specs in the comments below…
Additional Resources:
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