Duke 402

 
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Duke 402

Description

A really unknown manufacturer is “Duke”, which must have been a swiss-french manufactury, who produced a small lineup of movements around 1960.

Among these movements was the Duke 402, a 10 12 ligne pin lever movement shown here.

The strikung “jewelled” advertisment on the gear train bridge is a sure indication for a low-quality movement, and indeed, the only “Jewel” of this movement is the jewel of the balance ellipse.

base plate

base plate

Easy to see: All bearings of this pin lever movement are made of brass and don’t contain bearing jewels.

At 7 o’clock you can see the spring for the rocking bar winding mechanism, and at 1 o’clock, there’s the ratchet click.

gear train

gear train

We have the typical gear train for a pin lever movement: The mainspring barrel drives the center minute wheel, followed by third wheel, seconds wheel and escape wheel. On the top of the gear train bridge, there’s a gear sitting on the prolonged axle of the third wheel and drives the center second axle, which is spring-beared.

The escapement is a conventional pin lever escapement, and the balance is a pivot-beared, non shock-protected anular balance, which beats with 18000 A/h.

Duke 402: Dial side

Duke 402: Dial side

The dial side reminds a lot to those of Eppler movements. At 11 o’clock you see a well made click mechanism and at 3 o’clock the rocking bar winding system.

The dial side bearing of the balance wheel has got no cap jewels, but only a metal cap, which is not a very elegant solution, neither technically nor aesthetically.

Technical data

Manufacturer:Duke
Caliber:402
Number of jewels:1
Escapement:Pin lever
Balance types: Nickel anular balance
Shock protection(s): none
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel, mainspring barrel
Construction type:pillar construction
Winding mechanism:rocking bar winding system
Setting lever spring:1 hole(s)
Features:SCI
Functions:hour, minute, second
A/h:18000
Size:10 1/2''' (measured: 23,6mm)
Literature: Flume: 1962 25
Inventory number:18026

Usage gallery

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