PUW 461

 
PUW 461

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 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.

motion works

motion works

Since the release of the 2601260 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

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

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

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

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

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

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

The movement arrived in the lab in a watch, which appeared to be in good condition. Because of that, the movement was not serviced and cleaned.

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 right (12 up)

crown up (3 up)

crown up (3 up)

crown left (6 up)

crown left (6 up)

crown down (9 up)

crown down (9 up)

dial up

dial up

dial down

dial down

Technical data

Manufacturer:PUW
Caliber:461
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:
  • lever
  • escape wheel, seconds wheel, third wheel
  • center minute wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:1 hole(s)
Features:SCD,QG,RDR
Functions:hour, minute, second, day
A/h:18000
Size:11 1/2''' (measured: 25,5mm)
Production period:1969-1971
Literature: Flume: K3 41

Usage gallery

Porta gents watch

Porta gents watch

Links