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.
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...
|dial side view|
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.
|Number of jewels||15|
|Escapement||Anchor with pallets|
|Balance||Nickel screw balance|
|Balance cock direction||clockwise|
|Regulator type||Long regulator arm|
Fourth wheel, Third wheel, Center wheel
|Construction type||solid construction|
|Bridge shape||Gun to right, 3 gears|
|Setting lever spring||3 holes|
|Functions||Hour, minute, small second|
|Beats per hour||18000|
|Size||83/4 x 12''' (measured: 19,4 x 24,0 mm)|
|Image in Flume Werksucher ||1947 135|
This movement was donated by
. Thank you very much!