In the 1940s, form movements were quite popular, maybe due to the fact, that they allowed large mainspring barrels and balances.
The DuRoWe 275, made in the 1940s, belongs to this species and is pretty large with a size of 7 3/4 x 10 lignes.
Its golden color gives it a worthy appearance.
It’s noteable, that from this large base plate, a lot of available space is unused, because the construction with the decentral seconds indication at 6 o’clock doesn’t allow a better place consumption.
All important bearings contain rubies, another indication, that this movement belonged to the best wristwatch movements made in Germany at that time.
The gear train is standard, with mainspring barrel, directly driven center minute wheel, third wheel, seconds wheel (at position 6 o’clock) and a very filigree escape wheel. The latter one in beared under its own cock.
Of course, the monometallic screw balance is not yet shock protected.
As usual, it beats with 18000 A/h and regulates a swiss-type pallet lever movement. With the help of a long regulator arm, the beating frequency can be adjusted.
On the dial side, too, the DuRoWe 275, which has got the DuRoWe hallmark, but no caliber number engraved, makes a good impression.
As common on better movements, the keyless works uses a yoke winding system.
|Size:||7 3/4 x 11''' (measured: 17,2 x 25,0mm)|
|Number of jewels:||15|
Nickel screw balance (two legs)|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Long regulator arm|
|Construction type:||solid construction|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||2 hole(s)|
Flume: 1947 131|
Jacob: 1942 33 (15050)