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12.75''', Dm= 28.9mm, Do= 29.5mm
(incl. rotor holding plate, if not sunk in rotor)
f = 18000 A/h
power reserve 40h
Balance staff U1626
Mainspring / battery
1.58 x 9.0 x 0.095 x 290mm
replacement: Zf1269, 1.60 x 9.0 x 0.10 x 290mm
1.28 x 0.98 / 0.22mm
Comments about the data
1956-1963 (whole family)
pin-lever escapement with ruby pins (Fig.4)
detached manual wind
ratchet on dial side, crown mechanism with rocker bar
Base movement and automatic module (Fig.5) are pillar designs, where almost all lubrication spots are freely accessible. Thus both can be maintained only partially disassembled.
Modifications, especially varying rotor shapes, can't help with dating, due to the short manufacturing periode and missing records.
differences not known between 57/21, 57/21a
Even by simultaneous disassembling both, no differences were noticed, which not also exist between several samples of the 51/21.
manual wind, without shock protection:
48: sub second, 4 jewels
manual wind, many dedails modified:
48/4: sub second, 4 jewels
48/8, 48/8a: sub second, 8 jewels
48/10, 48/10a: sweep second, 10 jewels
manual wind, shock protection:
48/4a: sub second, 4 jewels
48/7: sweep second, 7 jewels
48/8b, 48/8c: sub second, 8 jewels
48/10b, 48/10c: sweep second, 10 jewels
manual wind, gilt, minor modifications:
48/00: sweep second, 0 jewels, pointed staff
48/05: sweep second, 5 jewels
48/15: sweep second, 15 jewels
48/75: sweep second, 7 jewels
48/75: sub second, 7 jewels
57/17: sub second, 17 jewels
57/17a: sweep second, 17 jewels
57/19: sweep second, 19 jewels
57/21, 57/21a: sub second, 21 jewels
57/22, 58/21: date, 21 jewels
Example, year: signature; shock device
1-5) ca. 1960: 57/21, Made in Germany - gu; Kienzle
6-7) ca. 1960: 57/21, Made in Germany - sd; Kienzle
8-9) ca. 1960: 57/21, Kienzle, Germany, Unadjusted, 21 Jewels - nu; Kienzle
Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.
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