Bifora 2025

 
Bifora 2025

Bifora 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.

different version

different version

Why the Bifora 2025 was available in different executions, as with a open gear train bridge, is not known.

base plate

base 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 above, the bearings are just made of brass, no jewels.

base plate, 15j version

base plate, 15j version

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.

gear train, 15j versions

gear train, 15j versions

The escape wheel is made of steel.

side view of the gear train

side view of the gear train

Since the movement is a (cost efficient) pillar construction, it builds pretty high.

side view of the gear train

side 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.

balance wheel with imitated screws

balance wheel with imitated screws

The balance screws are only mockups. They are no screws at all, but semicircular bulges. Good for the aesthetics, but useless technically-wise.

Bifora 2025: Dial side

Bifora 2025: Dial side

On the dial side, there’s a cost-efficient rocking bar winding system with the click mechanism on the inner side. The rocking bar itself has got a recess on some versions, through which you can see the function of the hands setting gear.

dial side, 15j version

dial side, 15j version

The three pillars of the work are fastened with triangular rivets.

Unfortunately, the manufacturing quality of this movement is pretty low, on the specimen shown here, the pillars are so warped, that the movement is no longer workable, and even the replacement of the, from Josef M.Stadl from the DGC donated escape wheel, did not help, on contrary, at the end, the very thin axle of the donated wheel broke as well :-(

Technical data

Manufacturer:Bifora
Caliber:2025
Size:8 3/4 x 12'''
A/h:18000
Number of jewels:7/ 15
Escapement:Pallet lever
Balance types: Nickel anular balance
Shock protection(s): none
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, large driving wheel, mainspring barrel
Construction type:pillar construction
Winding mechanism:rocking bar winding system
Setting lever spring:4 hole(s)
Features:
  • s (decentral seconds)
Production period:1928 - 1940
References: Flume: 1947 137
Inventory number:19022

Usage gallery

Bifora gents watch

Bifora gents watch

This movement with 15 jewels and its surrounding watch is a donation from Philipp Porter; the seven jewels movement is a donation from Rudolf Jeromin. Thank you very much for your kind support!