PUW 800

 
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PUW 800

Description

The PUW was produced in the mid/late 70ies. It is a ladies’ watch form movement with directly driven center second and uses an odd click spring mechanism.

Video on YouTube

For such a tiny form movement, a directly driven center second hand is very unusual.

Especially, with its mid-fast beating frequency of 21600 A/h, such a thing is rare to find, since normally, these tiny watches don’t show seconds at all, or use an indirectly driven center second hand.

Gears and click mechanism

Gears and click mechanism

Another, very odd, but efficient solution is the slipping click on top of the mainspring barrel. When the barrel is turned back, the spring blocks the blocking wheel and so brings the back-turn to an halt. When winding the movement, the spring slips forward, as far as possible, and so unblocks. Because of this mechanism, there’s no clicking sound any more, when you wind the watch.

side view of the gears

side view of the gears

On the side view, you can see the very compact gear construction. It’s not very much watchmaker-friendly :)

Some further details of the PUW 800: Three-leg balance, beared in two RUFA-Antishock bearings, ruby-beared(!) mainspring barrel (technically not neccessiary at all), but non-ruby-beared center minute wheel…

main plate

main plate

On the dial side, you see the preparations for a date indication mechanism. Normally, you won’t see it, since …

empty dial side

empty dial side

… on the date-less version, there’s a plate on top, which covers the whole dial side. It hides also the ruby bearing(!) of the minute wheel. No idea about the real purpose of the technically unneccessiary ruby bearing, but maybe the marketing department of the PUW required, that the movement has got 17 jewels.

PUW 800 dial side

PUW 800 dial side

In the lab

The specimen shown here was running OK, when it came into the lab, and hence was not cleaned and serviced.

Timegrapher result

The results are pretty poor, maybe a full service would have been a good idea. And probably, the poor results on the vertical positions were cause by a strong shock, which you can still see by the crack in the crystal (see below):
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


horizontal positions
dial up+60 s/d
dial down+55 s/d
vertical positions
crown right (12 up)+40 s/d
crown up (3 up)+60 s/d
crown left (6 up)-3'30 s/d
crown down (9 up)-2'20 s/d
Timegrapher output

Technical data

Manufacturer:PUW
Caliber:800
Number of jewels:17
Escapement:Pallet lever
Balance types: Nickel anular balance
Shock protection(s): Rufa-Anti-Shock
Balance bearing / direction hairspring:Clockwise
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:4 hole(s)
Features:SCD
Functions:hour, minute, second
A/h:21600
Size:6 3/4 x 8'''

Usage gallery

Kubela ladies' watch

Kubela ladies' watch

Links