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| Felsa 693 Bidynator Features automatic sweep second day: set by pusher at 9h date-hand: pusher at 4h month: pusher at 2h moon phase: pusher at 8h Data 11.5''', Dm= 26mm H= 7mm 17/21/25 jewels f = 18000 A/h power reserve 44h | Remarks 1942- first calibre family (series 690...699) with bidirectional rotor winding option: Reed's regulator optional Incastar regulator: The only large-scale produced regulator featuring a free oscillating hairspring. The end of the spring is fixed between two rollers, adjusting actually its length (photos at the bottom). No isochronism error by the gap between the regulator pins. family: 690,691,696,698: base 692: date 692N: date, 24h hand 693: calendar 694: date, pusher 695: sub second 697: day, date 699: power reserve display Example, year: signature; shock device ca. 1945: Rodania Watch Co, Swiss, 25 Jewels; Incabloc |
| bidfun 20.1 © 08-30-10, mtr |
 ...the alternative - free of charge! |
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