DuRoWe 1055

Durena 648

 
DuRoWe 1055

DuRoWe 1055

Description

In the mid 1950s, the rather high building Durowe 1055, a windup movement with a diameter of 10 1/2 lignes, was released.

There are no other versions known of this movement, so it was most probably only short-lived on the market and replaced quicky by other calibers of the same size.

base plate

base plate

Like more or less all Durowe movements, the Durowe 1055 too, is very well executed, and of course all im portant bearings contain rubies. The escape wheel bearing is even covered on both sides with a cap jewel.

base plate with center minute wheel

base plate with center minute wheel

It has got a direcly driven center minute wheel, which was still state of the art that time.

gear train

gear train

The rest of the gear train follows the usual standard with the third wheel, large center seconds wheel (directly driven) and finally the filigree steel escape wheel with long axle.

side view of the gear train

side view of the gear train

The two leg Glucydur screw balance is unusually filigree executed. She is beared in two three-leg shock protections and beats with 18000 A/h.

The exact frequency is adjusted with a long regulator arm.

As escapement, a swiss pallet lever escapement is used.

Durowe 1055: Dial side

Durowe 1055: Dial side

The base plate is slanted on the outer rim to save some height. This was neccessiary, since at that time, flat watches were en vogue.

Besides that, you have the ususal execution on the dial side with the yoke winding system and the large, but also filigree setting lever spring.

In the lab

The specimen shown here came without case and slightly dirty onto the archive and got a simple service.

Timegrapher result

Not only the amplitude values are really impressive, also the low deviations, which in median, almost completely neutralize each other.

horizontal positions
dial up +4 s/d 318° 1.9ms
dial down +10 s/d 325° 1.9ms
vertical positions
crown right (12 up) +4 s/d 305° 1.9ms
crown up (3 up) +4 s/d 295° 2.2ms
crown left (6 up) -14 s/d 284° 2.3ms
crown down (9 up) -3 s/d 285° 2.0ms

Technical data

Manufacturer:DuRoWe
Caliber:1055
Size:10 1/2''' (measured: 23,3mm)
A/h:18000
Number of jewels:17
Escapement:Pallet lever
Balance types: Glucydur screw balance (two legs)
Shock protection(s): 3 legs (generic)
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:solid construction
Winding mechanism:yoke winding system
Setting lever spring:4 hole(s)
Features:
  • SCD (direct center seconds)
References: Feilner: 2433
Flume: 1957 34
Inventory number:21017

Usage gallery

Dugena Festa gents watch  (case missing)

Dugena Festa gents watch (case missing)