PUW 461
Description
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 YouTubeIThe 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.
motion works
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.
side view of the gear train
The minute wheel is directly driven by the mainspring and beared under a distinct bridge.
inside train bridge: Crown wheel with click
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.
Grundplatine
Although the PUW 461 has got a large balance and a large mainspring barrel, its construction is quite compact.
dial side: detail bearing date wheel with spring
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.
dial side: detail escapement cap wheel
The escapement wheel bearings contain cap jewels. On the dial side, the cap jewel has got a rectangular shape.
PUW 461 dial side
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 result
Unfortunately, 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.
crown right (12 up)
crown up (3 up)
crown left (6 up)
crown down (9 up)
dial up
dial down
Technical data
| Manufacturer: | PUW |
| Caliber: | 461 |
| Size: | 11 1/2''' (measured: 25,5mm) |
| A/h: | 18000 |
| Number of jewels: | 17 |
| Escapement: | Pallet lever |
| Balance types: |
Nickel anular balance |
| Shock protection(s): |
Antichoc S65 |
| Balance bearing / direction hairspring: | Counterclockwise |
| Moveable stud: | yes |
| Adjust mechanism: | Hairspring key |
| Construction: |
|
| Construction type: | solid construction |
| Winding mechanism: | yoke winding system |
| Setting lever spring: | 1 hole(s) |
| Features: |
|
| Production period: | 1969-1971 |
| References: |
Flume: K3 41 |
| Mentioning in literature (years): | 1969 - 1971 |
Usage gallery
Porta gents watch
Links
* [Ranfft Uhren: PUW 461](http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&PUW_461)
This movement and watch was donated by [Harald Hoeber](index.php?option=com_content&view=article&id=61:donated-movements-of-harald-hoeber&catid=10&lang=en-GB&Itemid=201). Thank you very much!