Bifora 2025

 
sdfsdf

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 34 x 12 lignes and, easy to see, made with punched marts, such as the base plate:

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 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 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.

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.

Technical data

Manufacturer:Bifora
Caliber:2025
Number of jewels:7
Escapement:Pallet lever
Balance types: Nickel screw 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
A/h:18000
Size:8 3/4 x 12'''
Production period:1928 - 1940
Literature: Flume: 1947 137