Kienzle 058b12

 
Kienzle 058b12

Kienzle 058b12

Description

The large, 12 ligne, brass colored Kienzle 058b12 is likely to be launched in the mid 1960ies. It is part of the caliber series W058, a series of pin lever movements, which were available with and without center seconds in different revisions.

base plate

base plate

On the base plate of the pillar construction, you can already imagine, that it’s a jewel-less pin lever movement. Like on (almost) all Kienzle movements, the click mechanism is mounted on the base plate.

gear train

gear train

The biggest difference to movements like the caliber 051 is, that the caliber 058 uses an indirectly driven center second, and that there’s no directly driven minute wheel any more. The hands are indirectly driven by the second wheel and its cannon pinion on the dial side. Nevertheless, it is still possible to lengthen the staff of the fourth wheel at 6 o’clock and use it as decentral seconds indication.

side view of the gear train

side view of the gear train

The Kienzle 058b12 has got a large, two leg anular balance, which still beats slowly (and loud!) with 18000 A/h. It is not shock protected and is beared in two punch bearings. It regulates a conventional pin lever movement. The only jewel of that movement is the ellipse of the balance.

dial side without calendar mechanism

dial side without calendar mechanism

At 3 o’clock on the dial side, there’s the cannon pinion. Since it turns clockwise, the minute wheel is driven by a transmission wheel at 4 o’clock. The transmission wheel also drives the hour wheel, which also drives the date mechanism.

As (almost) all Kienzle movement, the Kienzle 058b12 has got a rocking bar winding mechanism.

date indication mechanism

date indication mechanism

The rather complicated date indication mechanism has got as main element a large switching wheel (at 1 o’clock) with a moveable switching finger. This ensures, that the date can be corrected semi-fast by turning the hands back and forth for a few hours.

It’s a bit odd, that here a date disc is used and not a date ring.

Kienzle 058b12 dial side

Kienzle 058b12 dial side

The gearing of the date disc is also secured by a spring, which ensures the correct position of the figures.

In the lab

Thanks to a donation, there are two movements (watches) with that movement. Since both were gummed, and additionally on one of the watches the dial feed were broken, it was possible to reconstruct one working watch with parts of both watches. Of course a revision had to be made, but the result was good!

Timegrapher result

For a 50 year old pin lever movement, which was treated quite badly according to the traces of the case, the results are great! Despite a non-moveable hairspring stud, the beat error is below 1 ms in all positions, and the amplitude is optimal with almost 300 degrees in all positions. Even the maximal rate difference with 41 seconds is great for a jewel-less pin lever movement!

horizontal positions
dial up +13 s/d 286° 0.2ms
dial down +6 s/d 292° 0.8ms
vertical positions
crown right (12 up) +45 s/d 293° 0.7ms
crown up (3 up) +15 s/d 301° 0.3ms
crown left (6 up) +4 s/d 297° 0.6ms
crown down (9 up) +32 s/d 301° 0.9ms

Technical data

Manufacturer:Kienzle
Caliber:058b12
Number of jewels:1
Escapement:Pin lever
Balance types: Nickel anular balance
Shock protection(s): none
Balance bearing / direction hairspring:Clockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, third wheel, large driving wheel, seconds wheel, mainspring barrel
Winding mechanism:rocking bar winding system
Setting lever spring:2 hole(s)
Features:SCI,QG,RDR
Functions:hour, minute, second, day
A/h:18000
Size:12'''
Literature: Flume: K3 -
Inventory number:16011

Usage gallery

Kienzle Markant gents watch

Kienzle Markant gents watch

Kienzle Markant gents watch

Kienzle Markant gents watch

This movement (and both watches) were kindly donated by Erwin. Thank you very much!