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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Cortebert 474-I

stem wind and set
sub second

18''', Dm= 40.2mm, Do= 40.8mm
H= 5.45mm
F= 0.55mm
T= 2.3mm
15 jewels
f = 18000 A/h
power reserve 37h

Balance staff U251

Stem W1499

Mainspring / battery
Zf3495, 2.00 x 16.0 x 0.20 x 460mm

1.95 x 1.10 / 0.30mm

Comments about the data

open face calibre
setting lever between plates
differences not known between 473, 474-I, 484, 486, 487, 495
The Cortebert 474 was obviously an experiment subject. Most registers ignore this, but Flume at least lists the variants I and II with differing setting bridges.

473, 474-I, 484, 486, 487, 495: 18''', open face
476: 19''', open face
479: 18''', open face, different balance
485: 18''', hunter, different balance
modified crown mechanism:
474-II: 18''', open face
477: 19''', open face

Example, year: signature; shock device
ca. 1910: - 050538
(Cortebert 476, 19''')

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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