DuRoWe 410

Description

The DuRoWe 410, whose origins date back the 1930ies (caliber 202), was a 10 1/2 ligne manual wind movement from Germany with a decentral seconds indication at 6 o’clock.

It was available in versions with different jewel count and with differently shaped gear train bridges, with and without separate escape wheel cock.

On the base plate, you can see the good quality of the movement: All important bearings are equipped with synthetic rubies, in total, this movement uses 15 jewels.

In the 7-jewels version, most bearings contain brass bushings of good quality.

The DuRoWe 410 uses the traditional gear train with mainspring, directly driven center minute wheel, third wheel, seconds wheel at 6 o’clock and finally the steel escapement wheel, which is beared in some versions under an own cock.

The screw balance is of course not yet shock protected. It beats contemporarily slow with 18000 A/h and regulates a pallet lever escapement of swiss type.

With the long regulator arm, the exact beating frequency can be adjusted.

There are no surprises on the dial side. Of course, like on all better movements, a yoke winding system is used. You can see its characteristical shape, which helps on identifying the movement.

In the lab

Timegrapher result

On the timegrapher, the rates of the 7-jewels movement of the Laco gents were measured. For a more than 80 years old watch, the results are acceptable, especially the virtually nonexisting beat error is impressive! The larger deviations between hanging and laying positions, altough the amplitude is perfectly high, is probably caused by the small balance wheel.