The DuRoWe caliber 7420⁄2 is a common 11 1⁄2 ligne handwinding movement with 17 jewels, which is constructed in a familiar way. It is a direct relative of the 7410⁄2 and differs only by the size of the main plate.
It uses a three-leg balance, which is beared in two Rufa-Anti-Shock protection systems and whose hairspring is connected to a moveable stud and adjusted by a long direct regulation arm.
The center second is directly driven and the minute wheel is in the center.
On the dial side, you see the yoke winding system.
|Number of jewels:||17|
Nickel anular balance|
|Balance bearing / direction hairspring:||Counterclockwise|
|Adjust mechanism:||Hairspring key|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||3 hole(s)|
|Functions:||hour, minute, second|
|Production period:||1972 - ~1983|
Flume: K3N1 -|