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.
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| dial side view |
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Technical data
| Manufacturer | Bifora |
| Caliber | 91 |
| 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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| Factsheet |
Usage gallery
