This site uses cookies for monitoring purposes. If you continue using this site, you accept this cookie policy.

Bifora 2025

Bifora 2025Bifora 2025

Description

The caliber Bifora 2025 was the first inhouse lever movement of the german manufactury Bidlingmaier in Schwäbisch Gmünd. It probably was the first form lever movement ever made in Germany.

Its production started in 1928 and replaced the former swiss made form lever movement, Bidlingmaier used that time in their watches.

The cost efficient pillar construction is rather big with 8 3/4 x 12 lignes and, easy to see, made with punched marts, such as the base plate:

 base platebase plate

The punched base plate reminds a lot of simple movement constructions, which were common at that time especially in round shape.

In the specimen shown here, the bearings are just made of brass, no jewels, but there were also versions of that movement available, which had 15 jewels and so all bearings with rubies.

gear train  (incomplete)gear train (incomplete)

The gear train is a very conventional one with subseconds at "6" and mainspring barrel, which can be released, at 12 o'clock.

side view of the gear trainside view of the gear train

The not shock protected screw balance beats contemporarily slow with 18000 A/h and controls a swiss-type pallet lever movement.

Bifora 2025 dial sideBifora 2025 dial side

On the dial side, there's a cost-efficient rocking bar winding system with the click mechanism on the inner side.

 

 Technical Data

ManufacturerBifora
Caliber2025
Number of jewels7
EscapementAnchor with pallets
BalanceNickel screw balance
Shock protection(s)none
Balance cock directionclockwise
Hairspring studfixed
Regulator typeLong regulator arm
Movement constructionFork
Escapement wheel, Fourth wheel, Third wheel, Large driving wheel, Mainspring barrel
Construction typepillar construction
Winding mechanismRocking bar
Setting lever spring4 holes
Featuress
Beats per hour18000
Size83/4 x 12'''
Production time1928 - 1940
Image in Flume Werksucher 1947 137
Bifora 2025BiforaBifora20251928 - 19408 3/4 ''' 12'''Bifora 20257 Jewels, 8 3/4 x 12''', 18000 A/h, s
Factsheet

 

This movement was donated by Rudolf Jeromin. Thank you very much!