Gradus
Created Thursday 31 October 2024
Gradus 17 Jewel
AS 1686
The brand name Gradus was registered by the Gladiator Watch Company of London in 1947, a London based importer and distributor of Swiss watches.
Possibly also sold as Fortis
Manufacturer: AS
Caliber: 1686
Size: 11 1/2'''
A/h: 18000
lift angle: 52°
Number of jewels: 17
Escapement: Pallet lever
Balance types: Nickel anular balance
Shock protection(s): KIF Satellor
Balance bearing / direction hairspring: Counterclockwise
Adjust mechanism: Hairspring key
Construction:
lever escape wheel, seconds wheel, third wheel
center minute wheel
mainspring barrel
Features:
SCD (direct center seconds)
References: Flume: K3 43
Mentioning in literature (years): 1964
Gradus ETA
Gradus ETA
Gradus ETA
ETA1080
Manufacturer ETA
Caliber Number 1080
Movement Type Mechanical, manual-wind
Lignes 10.5”’
Diameter Overall 23.7mm
Casing Diameter 23.3mm
Height 4.15mm
Jewel Count 17
Beat Rate / Frequency 18,000 bph / 2.5 Hz
Lift Angle 52 degrees
Power Reserve ~40 hours
Anti-Shock Device: Incabloc
Hand Count 3
Backlinks: Watches