Swiss Made FHF Cal.691 17 Jewels Manual Wind Watch Movement (New Old Stock)

The “Standard” caliber 691 of the Fabrique d’Horlogerie de Fontainemelon bases on the common FHF caliber 69 and added a center second hand to it.

Since the available space is very low on these form movements, the FHF had to use an extraordinary solution: The fourth wheel indirectly drives a wheel on the top of the main plate, which itselfs drives the center second pinion.

The rest of the caliber 691 is identical

Features
manual wind
sweep second

Manufacturer: FHF
Caliber: 691 (ST)
Number of jewels: 17
Escapement: Pallet lever
Balance types: Nickel anular balance
Shock protection(s): Incabloc
Balance bearing / direction hairspring: Counterclockwise
Moveable stud: yes
Adjust mechanism: Fonto
Construction:
•lever
•escape wheel, seconds wheel, third wheel, center minute wheel
•center second pinion
•mainspring barrel
Winding mechanism: yoke winding system
Setting lever spring: 4 hole(s)
Features: SCI
Functions: hour, minute, second
A/h: 21600
6.75 x 8''', Dm= 15.3 x 17.8mm
Do= 15.3 x 18.2mm
H= 4.2mm
F= 0.8mm
T= 1.7mm
17 jewels
f = 21600 A/h
power reserve 48h
Balance staff U3261
Stem W2042
Hands 1.10 x 0.60 x 0.18mm

Condition : New Old Stock (Unused Fully working Before starting it, it is worth cleaning and lubricating it)

Country of Manufacture : Swiss

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