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FHF 821FHF 821


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 1/2 to 11 1/2 lignes. The rest of the construction remained the same.

Gears and trainsGears 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 worksside 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 platelarge 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 sideFHF 821 dial side

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


Technical data

Number of jewels17
EscapementAnchor with pallets
Shock protection(s)none
Balance cock directionclockwise
Hairspring studmoveable
Regulator typeHairspring key
Movement constructionFork
Escapement wheel, Third wheel, Fourth wheel, Center wheel
Mainspring barrel
Construction typesolid construction
Winding mechanismyoke
Setting lever spring3 holes
FunctionsHour, minute, small second
Beats per hour21600
Size111/2''' (measured: 25,55 mm)
Image in Flume Werksucher K3
FHF 821FHFFHF82111 1/2'''FHF 82117 Jewels, 11 1/2''', 21600 A/h, s


Usage gallery

Darwil mens' watch, model 7012Darwil mens' watch, model 7012