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Bifora 91/1

 

Bifora 91/1Bifora 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 subsecondsversion with subseconds

side viewside view

Bifora 91/1 dial side, version with 15 jewelsBifora 91/1 dial side, version with 15 jewels

 

 Technical data

ManufacturerBifora
Caliber91/1
Number of jewels15/17
EscapementAnchor with pallets
BalanceNickel
Shock protection(s)Bidlingmaier (Bifora)
Balance cock directionclockwise
Hairspring studmoveable
Regulator typeHairspring key
Movement constructionFork
Escapement wheel, Fourth wheel, Third wheel, Center wheel
Third wheel, Center second pinion
Mainspring barrel
Winding mechanismyoke
Setting lever spring3 holes
FeaturesSCI(s)
FunctionsHour, minute, second(ss)
Beats per hour18000
Size93/4'''
Production time1962 - 1980
Image in Flume Werksucher K3 18
Bifora 91/1BiforaBifora91/11962 - 19809 3/4''''''Bifora 91/115/17 Jewels, 9 3/4'''''', 18000 A/h, SCI(s)
Factsheet

 

Usage gallery

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