Bifora 91

 
Bifora 91

Bifora 91

Description

The midsize Bifora cal. 91 was used a lot in the 60ies and 70ies. It was vailable in two versions, one with fully integrated, indirectly driven center second and the other with a decentral small subsecond. Both versions use the same plates.

Like many Bifora movements, this one uses a Bishock shock protection system. It can only be found in Bifora movements.

On the dial side, there’s a yoke winding system.

Bifora 91 dial side

Bifora 91 dial side

Technical data

Manufacturer:Bifora
Caliber:91
Number of jewels:17
Escapement:Pallet lever
Balance types: Nickel anular balance
Shock protection(s): Bidlingmaier (Bifora)
Balance bearing / direction hairspring:Clockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel
  • third wheel, center second pinion
  • mainspring barrel
Winding mechanism:yoke winding system
Setting lever spring:3 hole(s)
Features:SCI
Functions:hour, minute, second
A/h:18000
Size:9 3/4'''
Production period:1962 - 1980
Literature: Flume: K3 18

Usage gallery

Ankra mens' watch

Ankra mens' watch

Links