Cattin 54 (Ellipse)

 
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Cattin 54 (Ellipse)

Description

The french pin lever movement Cattin 54, here with balance wheel ellipse, is a rare movement, compared to other Cattin movements. It was available in different versions, with and without date and different number of jewels.

base plate

base plate

The base plate of this Roskopf-type pillar construction shows full usage of jewel bearings - this it not ubiquotous on pin lever movements.

gear train

gear train

The gear train shows the directly driven center second and the missing minute wheel, since the hands are both driven on the dial side by a slip clutch on the mainspring barrel.

The screw less anular balance beats slowly with 18000 A/h and is beared in two simple shock protections, which only protect axially. Unfortunately, this was not sufficient for the specimen shown here, whose balance wheel is broken, probably due to a hard hit.

It’s a bit odd, that the ratchet of the mainspring barrel is within the gear train, at 11 o’clock.

side view of the gear train

side view of the gear train

The crown wheel is on the inner side of the top gear plate, under which no less than four gears and the mainspring barrel are beared:

lower side of the top gear plate

lower side of the top gear plate

As common on Roskopf movement, the mainspring barrel has got a slipping clutch on top, whose two gears drive minute- and hour hand at the same time. Because of that, no further gears are neccessiary.

mainspring barrel

mainspring barrel

On the dial side, you see the yoke winding system (a bit unusual for pin lever movement) and the axial shock protection system for the balance wheel. At 10 o’clock there are two blue jewels, which have no use at all but to increase the number of jewels to the “magical” number of 17, which was a synonym for a high quality movement.

Cattin 54 dial side

Cattin 54 dial side

Technical data

Manufacturer:Cattin
Caliber:54 (Ellipse)
Number of jewels:17
Escapement:Pin lever
Balance types: Nickel anular balance
Shock protection(s): Mortima
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, large driving wheel, mainspring barrel
Construction type:pillar construction
Winding mechanism:yoke winding system
Setting lever spring:1 hole(s)
Features:SCD
Functions:hour, minute, second
A/h:18000
Size:11 1/2''' (measured: 25,9mm)
Literature: Flume: K2 -
Inventory number:16016

Usage gallery

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Mortima gents watch

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