| Brand | Tissot, Chs Tissot & Fils |
| Caliber Number | 784-2 |
| Movement Type | Automatic, self-winding mechanical |
| Lignes | 11.5”’ |
| Diameter | 26mm |
| Height | 5.2mm |
| Jewel Count | 21 |
| Beat Rate | 18,000 vph |
| Lift Angle | 52 degrees |
| Power Reserve | ~45 hours |
| Anti-Shock Device | Incabloc |
| Hand Count | 3 |
| Hand Sizes | 1.5mm / 1.2mm / .21mm |
| Functions | Central hours; central minutes; central sweeping seconds; date at 3:00 |
| Quickset Date? | No |
| Country of Manufacture | Switzerland, Swiss made |
| Known Models | Vintage Tissot Seastar, Seastar Seven (Add your watch to the comments below…) |
The Tissot caliber 784-2 is a vintage automatic watch movement from the late 1960s to early 1970s (circa 1968~1972?).
This movement is not equipped with a quickset date, however, you can advance the datewheel by moving the hands from around 8PM to past 12AM, then back to 8PM to 12AM, and so on.
Video: Restoring a Tissot Seastar Cal 784-2
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