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Felsa 690

 

Felsa 690Felsa 690

Description

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.

 

 

 Technical data

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
Felsa 690FelsaFelsa6901947-11 1/2''''''Felsa 69017 Jewels, 11 1/2'''''', 18000 A/h, SCD,AUT
Factsheet