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Bifora 91

Bifora 91


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

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

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

dial side view

Technical data

Manufacturer Bifora
Number of jewels 17
Escapement Anchor with pallets
Balance Nickel
Shock protection(s) Bidlingmaier (Bifora)
Balance cock direction clockwise
Hairspring stud moveable
Regulator type Hairspring key
Movement construction Fork
Escapement wheel, Fourth wheel, Third wheel, Center wheel
Third wheel, Center second pinion
Mainspring barrel
Features SCI
Functions Hour, minute, second
Beats per hour 18000
Size 93/4'''
Image in Flume Werksucher  K3 18

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