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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

Buser 18.5'''H4.15 open face

stem wind and set
sub second

18.5''', Dm= 41.25mm, Do= 42.7mm
H= 4.15mm
F= 0.45mm
T= 2.15mm
15 jewels
f = 18000 A/h
power reserve 34h

Balance staff U2063 (Buser 95/96)

Stem W1509 (Buser 95/96)

2.00 x 1.10 / 0.26mm

Comments about the data

open face calibre
Breguet hairspring
This calibre isn't listed in any common register. But Flume lists a Buser 19''' with equivalent hunter plate layout (Fig.3), and Ronda mentions a Buser 19'''Nidor (brand of Buser), but both are about 6.5mm high. More commonly the calibres Buser 95 (open face) and 96 (hunter) are listed. They have a different layout (Fig.4), but about the same height. Therefore their data are partially adopted here.

Example, year: signature; shock device
1-2) ca. 1930: Nidor***
3) 1947: old data sheet
4) 1949: 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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