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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

3000 anonymous

Features
key wind and set
independent jumping sweep second

Data
20''', Dm= 44.6mm, Do= 45.1mm
H= 4.35mm
F= 0.5mm
20 jewels
f = 18000 A/h
power-reserve 31h
run time independent second 32h

Mainspring / battery
key 1.2²mm

Hands
watch : 1.35 x 16.0 x 0.20mm
second: 1.35 x 13.5 x 0.20mm

Comments about the data

Remarks
movement type: Lepine-Calibre III
cylinder escapement
two barrels with barrel with Geneva stopwork
indirect minute
start- and stoppable jumping sweep second (Fig.3):
The last pinion A of a separate train with own barrel has a lever B. This is stopped by each of the 6 teeth of the escape wheel pinion C, and a bit later released. As the escape wheel with 15 teeth turns once in 6 seconds, the lever B is released once per second, and the second hand can advance one second. If the end of the stop lever D is set to the left, it stops lever B, so the second hand stops, but the time train continues running.

Example, year: signature; shock device
ca. 1840: - 91
on case: 10694, ERT, 16 (91 respectively), 18K - Echàppement à Cylindre, Dix Huit Trous en Rubis (cap jewels not counted back then), Secondes Indépendentes

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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