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View picture in original size
Fig. 1

Unitas 6497

stem wind and set
sub second

16.5''', Dm= 36.6mm, Do= 37.2mm
H= 4.2mm
F= 0.5mm
T= 1.85mm
15/17 jewels
f = 18000 A/h
power reserve 50h

Balance staff U3461

Stem W1418

Mainspring / battery
Zf3016, 1.50 x 15.0 x 0.18 x 450mm

2.00 x 1.15 / 0.27mm

Comments about the data

open-face calibre

18000 A/h, pallet lever cock:
Unitas 6497: open face
Unitas 6498: hunter
Unitas 6503: open face, date
18000 A/h, pallet lever bridge, Etachron regulator:
ETA/Unitas 6497-1: open face
ETA/Unitas 6498-1: hunter
21600 A/h, pallet lever bridge, Etachron regulator:
ETA 6497-2: open face
ETA 6498-2: hunter

Example, year: signature; shock device
ca. 1965: UZ, Unitas 6497, 6503, Arnex Tim Co Inc, Swiss, 17 Jewels; Incabloc
(Unitas 6503)

© R. Nienaber

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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