Bifora 91/1

 
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Bifora 91/1

Description

This movement is full of rust, but is still working and is still pretty reliable.

The Bifora 911 is available 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.

version with subseconds

version with subseconds

side view

side view

Bifora 91/1 dial side, version with 15 jewels

Bifora 91/1 dial side, version with 15 jewels

Technical data

Manufacturer:Bifora
Caliber:91/1
Number of jewels:15/17
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),(s)
Functions:hour, minute, (second), (decentral second)
A/h:18000
Size:9 3/4'''
Production period:1962 - 1980
Literature: Flume: K3 18

Usage gallery

Bifora ladies' watch

Bifora ladies' watch

Bifora ladies' watch

Bifora ladies' watch