FHF 60

Dugena 872

 
FHF 60

FHF 60

Description

Although FHF was primarily known for their round movements, they also had a number of form movements for ladies’ watches in their program.

Amoung the earliest form movements is the 6 3/4 ligne caliber FHF 60, which was launched in the late 1940s and was later replaced by the million seller FHF 69.

base plate

base plate

Of course, all important bearings carrie rubies, which is important on movements of that tiny size to reduce friction and wear on the tiny axles.

gear train

gear train

The very compact gear train follows the classical construction with directly driven center minute wheel, followed by third wheel, seconds wheel and steel escape wheel. Third and fourth wheel have a very small diameter.

side view of the gear train

side view of the gear train

Since the escape wheel has got a rather large diameter, the bearing of the fourth wheel has to be on top of it.

As escapement, a swiss pallet lever escapement is used, which is regulated by a monometallic screw balance, beating wiht 18000 A/h.

The adjustment happens on the hairspring key directly.

Of course, the balance wheel is yet secured against shocks by two Incabloc shock protections.

FHF 60: Dial side

FHF 60: Dial side

On the dial side, you see the yoke winding system and a partial minute dial at 6 o’clock. It was used to have the possibility to adjust the un-cased movement.

In the lab

The specimen shown here came with a visible water damage into the archive and got a simple revision.

Timegrapher result

Most of the rates are pretty impressive, however there are two runaways, probably caused due to wear. This theory is also backed by the fact, that the vertical amplitured are significantly lower than those of the horizontal positions.

horizontal positions
dial up +-0 s/d 295° 0.8ms
dial down +-0 s/d 300° 0.5ms
vertical positions
crown right (12 up) +20 s/d 234° 0.5ms
crown up (3 up) +5 s/d 224° 1.1ms
crown left (6 up) -6 s/d 240° 1.3ms
crown down (9 up) +27 s/d 235° 0.5ms

Technical data

Manufacturer:FHF
Caliber:60
Size:6 3/4 x 8'''
A/h:18000
Number of jewels:17
Escapement:Pallet lever
Balance types: monometallic screw balance (two legs)
Shock protection(s): Incabloc
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:4 hole(s)
References: Ebauches: 1949 I 24
Feilner: 815
Mentioning in literature (years): 1964
Inventory number:21011

Usage gallery

Dugena Festa ladies' watch

Dugena Festa ladies' watch

This movement and watch is a kind donation from Lars Schröder to the movement archive. Thank you very much for your support!