FHF 821

 
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FHF 821

Description

The FHF 821 is a flat 17 jewels manual wind movement.

It bases on the caliber 82, with the only difference, that the diameter of the main plate was increased from 10 12 to 11 12 lignes. The rest of the construction remained the same.

Gears and trains

Gears and trains

The FHF 821 (Darwil also called it “Darwil 7066”), is a traditional construction with subseconds at “6” and directly driven center minute wheel. This wheel is even ruby beared. Normally, this 17th ruby is not used here, but would have been used as cap jewel for the escapement wheel, but that would have increased the height.

side view of the gear works

side view of the gear works

The ring balance, which is (unfortunately) not shock protected already beats with rather modern 21600 A/h and controls a true swiss pallet lever movement, whose pallets are transparent.

The lack of a shock protection in movements of the 60ies was due to makeing it extra flat, which was very popular then. The flat movement construction also reduced the height.

large main plate

large main plate

Interestingly, the main plate is stamped as “FHF 82”. This is pretty odd, since the FHF 82 uses a different, smaller, main plate!

FHF 821 dial side

FHF 821 dial side

On the dial side, you see the yoke winding system and the decentral second indication at “6”.

Technical data

Manufacturer:FHF
Caliber:821
Number of jewels:17
Escapement:Pallet lever
Balance types: Nickel anular balance
Shock protection(s): none
Balance bearing / direction hairspring:Clockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, third wheel, seconds wheel, center minute wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:3 hole(s)
Features:s
Functions:hour, minute, decentral second
A/h:21600
Size:11 1/2''' (measured: 25,55mm)
Literature: Flume: K3

Usage gallery

Darwil mens' watch, model 7012

Darwil mens' watch, model 7012