The PUW 461, which was only built for two years, was a state-of-the-art handwound movement, made in Germany, with directly driven center second and a slowly advancing date indication.Video on YouTube
IThe PUW 461 bases directly on the second generation of the PUW 361. Its most noteable difference is the setting lever spring, which is no longer locked by a screw, but by a spring now.
Since the release of the 260⁄1260 caliber series in 1960, the movement construction was not modified and the beating rate with 18000 A/h stayed the same, too.
The minute wheel is directly driven by the mainspring and beared under a distinct bridge.
The position of the crown wheel is pretty odd, since it is not located on the upper side of the mainspring bridge, but on the inner side of the gear bridge. Additionally, the click secures the crown wheel. The mainspring barrel wheel, which is located on the inner(!) side of the mainspring bridge, has no blocking function any more.
Although the PUW 461 has got a large balance and a large mainspring barrel, its construction is quite compact.
To adjust the date by setting the time forth and back, the PUW 461 uses a moveable beared date wheel, which decouples the date ring when the hands are set back.
The only bad thing of this mechanism is, when the spring, which puts the date wheel to the date ring, breaks, the date ring will no longer advance.
The escapement wheel bearings contain cap jewels. On the dial side, the cap jewel has got a rectangular shape.
On the dial side, you see the yoke winding system and the date wheel with its switching finger. The date advances slowly. The successor of this movement, the PUW 561, uses an instant switching mechanism.
In the lab
Timegrapher resultUnfortunately, the timing results are very poor. The reason is unknown, but either the balance wheel was damanged (bent pivots) or the whole movement really needs revision. In either case, those large deviations are completely atypical for that movement series.
|Number of jewels:||17|
Nickel anular balance|
|Balance bearing / direction hairspring:||Counterclockwise|
|Adjust mechanism:||Hairspring key|
|Construction type:||solid construction|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||1 hole(s)|
|Functions:||hour, minute, second, day|
|Size:||11 1/2''' (measured: 25,5mm)|
Flume: K3 41|