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View picture in original size
Fig. 1

View picture in original size
Fig. 2

View picture in original size
Fig. 3

Buser 140

Features
manual wind
sweep second

Data
11.5''', Dm= 25.6mm, Do= 25.9mm
H= 4.3mm
F= 1.1mm
T= 1.9mm
21 jewels
f = 18000 A/h
power-reserve 40h

Balance staff U1970

Stem W600

Mainspring / battery
Zf591, 1.15 x 9.5 x 0.11 x 290mm

Hands
1.65 x 1.20 x 0.30mm

Comments about the data

Remarks
straight lever (ligne angulaire)
strange train (Fig.3):
The 2nd wheel A drives as usual the 3rd wheel B.
But between 3rd wheel and sweep-second wheel E there are two additional wheels C and D.
The sweep-second wheel E doesn't drive the escape wheel G directly as usual, but over a further wheel F.
All in all three additional pinions with wheels leave no space for a big balance and a big barrel, and they cost money. Any advantage in return is not noticeabel, and one must regard this movement as beautiful oddity.

family/generations:
140: manual wind
145: automatic
redesign, mainly of the automatic:
141: manual wind
146: automatic

Example, year: signature; shock device
ca. 1945: Peerex, Swiss, 21 Jewels - SW

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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