PUW 500
Description
When the movement production of the Pforzheimer Uhrenrohwerke in Germany started in the 1930ies, the first ever made movement was a form movement with a size of 8 3/4 x 12 lignes, which (at least according to the Flume K1) had not yet an own caliber number. It was later named “PUW 500” and was produced for 25 years.
You can clearly recognize the old-fashioned construction with an escapement wheel cock and a small gear bridge, which houses only three gears.
The screw balance is of course not yet shock protected in the old version, but contains a long regulator arm for adjustment.
base plate
On the empty main plate, you see, that the available space is not fully used. There are large areas, which are not hollowed, on top right and bottom left. So many unused space…
Zifferblattseite
On the dial side, there’s nothing viewy. The yoke winding system, with its U-shaped setting lever spring (an indication for the early PUW 500) is clearly visible, as well, as the cap jewel and its long plate of the balance staff bearing (position “8”). At position “2”, there’s the old PUW punch.
Technical data
| Manufacturer: | PUW |
| Caliber: | 500 |
| Size: | 8 3/4 x 12''' (measured: 19,6 x 26,3mm) |
| A/h: | 18000 |
| Number of jewels: | 15 |
| Escapement: | Pallet lever |
| Balance types: |
monometallic screw balance (two legs) |
| Shock protection(s): |
none |
| Balance bearing / direction hairspring: | Clockwise |
| Moveable stud: | no |
| Adjust mechanism: | Long regulator arm |
| Construction: |
|
| Construction type: | solid construction |
| Winding mechanism: | yoke winding system |
| Setting lever spring: | 3 hole(s) |
| Attachment of setting lever: | screwed |
| References: |
Feilner: Bl. 14 555 Flume: 1942 S.38 319 524 Jacob: 1942 15 061 |
| Mentioning in literature (years): | 1950 |
| Inventory number: | 24013 |
Related Movements
- PUW 500 : setting lever starts on top
- PUW 500 neu : setting lever starts on bottom and U-shaped cutout on top
Links
* [Ranfft Uhren: PUW 500](http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&PUW_500)
This movement was donated by [Rolf-Jürgen](index.php?option=com_content&view=article&id=63:donated-movements-by-rolf-juergen&catid=10&lang=en-GB&Itemid=201). Thank you very much!