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View picture in original size
Fig. 1

View picture in original size
Fig. 2

AS 1539

Features
manual wind
sweep second

Data
11.5''', Dm= 25.6mm, Do= 26.0mm
H= 3.8mm
F= 1.2mm
T= 2.0mm
17/21 jewels
f = 18000 A/h
power-reserve 46h

Balance staff U2450 / U3140
balance with/without screws

Stem W2541 / W3231 / W3232
(normal / shaft 3mm / 4.8mm for Mondia)

Mainspring / battery
Zf682, 1.20 x 9.5 x 0.105 x 300mm

Hands
1.50 x 0.90 x 0.21mm

Comments about the data

Remarks
differences not known between 1539, 1611, 1615
A date model based on the AS 1539 exists, but was likely exclusively produced as Wittnauer C11WS2.

family/generations:
base calibre H= 4.07mm:
1506: manual wind, 10.5'''
1507, 1551: manual wind
1558: manual wind, date
base calibre H= 3.8mm:
1538, 1593: manual wind, 10.5'''
1539, 1611, 1615: manual wind
1580: automatic
1581: automatic, date
rotor modified:
1624, 1664: automatic
1626: automatic, 13'''
1628, 1641, 1665: automatic, date
1636: automatic, date, 13'''
rotor modified:
1680: automatic
1681: automatic, date
bridges, rotor, date modified:
1700, 1788: automatic
1701: automatic, date
1702: manual wind
1703: manual wind, date
1709, 1767, 1806: automatic, day, date
1789: automatic, date, 24h display
1813: manual wind, day, date

Example, year: signature; shock device
1) ca. 1955: Rado, Swiss, 17 Jewels; Incabloc
2) 1962: old data sheet

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.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft


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