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 Index  Timepiece Archive, Categories  Archive: Watch Movements    Timepiece Market 
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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

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Fig. 5

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Fig. 6

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Fig. 7

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Fig. 8

Glycine Eugene Meylan

automatic (bumper)
no manual wind
sub second

11.5''', Dm= 26.0mm, Do= 26.25mm
H= 5.8mm
F= 0.9mm
T= 2.0mm
manual-wind base movement:
8.75''', Dm= 19.4mm, Do= 19.7mm
H= 3.4mm
(ratchet wheel +0.8mm)
F= 0.5mm
T= 1.7mm
19 jewels
f = 18000 A/h
power reserve 30h

Balance staff U42

Stem W160

Mainspring / battery
Zf479, 1.10 x 7.5 x 0.09 x 220mm

1.20 x 0.60 / 0.12mm

Comments about the data

bimetallic screw balance
base movement Venus 60-II (Fig. 7, 8)
special barrel with Geneva stopwork (see below)
It is strange that a Venus 60-II was used as base movement, although fitting Glycine calibres were available. Actually two gaps (A in Fig.4) for an alignment pin indicate that the module was designed to match several base movements. May be an 8.75''' caliber exists, where the positions of crown- and ratchet wheel allow that the crown wheel needs not to be removed, and manual winding remains possible. For the Venus 60-II it would be neccessary to make the crown wheel thinner for this purpose.

The limiting of selfwinding neither by friction clutch nor by blocking the rotor is likely unique (Fig.5,6):
The rotor A turns wheel B only in one direction, due to pawl C. Another pawl D (hidden) and the pawl wheel E prevents that energy, passed to the barrel via pinion F, returns to the rotor when it swings back - so far like in most bumper automatics. But here the gear G and the pawl wheel E on the same arbor are coupled by a spring. This does nothing as long as the mainspring is not fully wound. But if fully wound, the excessive energy from the rotor is stored in this spring, and is fed back to the rotor when it swings in the other direction.
However, if the mainspring is fully wound, further wrist motions apply a rather high torque to the ratchet wheel. But the Geneva stopwork prevents that this is passed to the train, making the balance bounce.
An intersting detail: In most bumper automatics the rotor bearing is exposed to excessive wear. Here the rotor is guided between two rings by four jewels H, leaving no strong load for the center bearing.

The patent numbers on base movement and module are an advertising joke: They refer to a jigsaw (CH81653), a drive-belt protector (CH77588), two chemical processes for colors (CH77878, CH81251), a twine machine (DE114688), and an oil can (DE114720).
But later samples are known, with different base movement and serious patent numbers:

Swiss Patent 149137:
filed 10-15-1930, Eugène Meylan, La Chaux de Fonds (CH)
automatic module without friction clutch as described here
Swiss Patent 149138:
filed 10-24-1930, Eugène Meylan, La Chaux de Fonds (CH)
attachment to above patent

Example, year: signature; shock device
ca. 1930: Brevet +81653, Glycine Automatic E.M.S.A. (Eugene Meylan S.A.), Pat. Appl. for +77588.77878.81251, D.R.P.Anm. 114688

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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