FS81 Miyota Watch Movement Chrono, 3 hands (120/70/17): hour/minute/second, 3 indicators (26): day retrograde @ 3, small second @ 6, 30 minutes reg. @ 10, date @ 4 suspended, movement height 5.10 mm, total height 7.10 mm, stem 065-549, cell 377. FS81 is 10 ½ ligne and measures 23.0 x 22.00 mm.