Felsa 690

Felsa 690 (Bidynator)
Felsa 690 (Bidynator)

The Felsa Bidynator movement (here caliber 690, the second generation of "Bidynator" movements), was the first one, to wind in both rotor directions. It is the precessor of the modern selfwindig wristwatch.

ManufacturerFelsa
Caliber690
Number of jewels17
EscapementAnchor with pallets
BalanceNickel screw balance
Shock protection(s)Incabloc
Balance cock directionclockwise
Regulator typeSwan neck
FeaturesSCD,AUT
FunctionsHour, minute, second, selfwinding
Beats per hour18000
Size111/2'''
Production time1947-
Image in Flume Werksucher 1949 I 54
Factsheet