Bifora 91/1

 
Bifora 91/1

Bifora 91/1

Description

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

The Bifora 91/1 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