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  1. #1

    Default Georges-Frédéric Roskopf. Prototype.

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    The first watches manufactured by Roskopf were provided with a cylindre escapement. Only a few were manufactured.
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    Information about my "Proletarian Watch"?.

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    My Proletarian Watch type 2:
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    Thanks. Greetings from Spain.
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  2. #2
    Registered User Burkhard Rasch's Avatar
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    Default Re: Georges-Frédéric Roskopf. Prototype. (By: DRINFEAL)

    I agree that Your watch is a simple,low-jewel-count cylinder,but:allthough case and hands look like the Rosskopfs the skrews are blued,the plates gilt and the cylinder escapement in general is more expensive to make than a pin pallet lever from stamped parts. The train layout is not that of a Rosskopf either.What makes You believe that Your cylinder watch has something to do with Rosskopf,especialy early ones in the senmse of a "prototype".Are there any signatures?
    Best regards
    Burkhard
    Gigni de nihilo nihil,et nihil in nihilum posse reverti
    (Persius)

  3. #3

    Default Re: Georges-Frédéric Roskopf. Prototype.

    https://relojesdebolsilloantiguos.wo...roximamente-3/
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  4. #4

    Default Re: Georges-Frédéric Roskopf. Prototype.

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  5. #5

    Default Re: Georges-Frédéric Roskopf. Prototype. (By: DRINFEAL)

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    The book The Proletarian Watch by Albin Schaeder includes this prototype?
    Thanks.
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  6. #6
    Technical Admin Tom McIntyre's Avatar
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    Default Re: Georges-Frédéric Roskopf. Prototype.

    It seems that the more common Roskopf watch has a distinct train with no center arbor, which makes it easy to recognize. I think that few would argue that the cylinder could compete with it on cost. Since the cheap construction was the goal, if Roskopf started making cylinders to try to achieve the cost goals, he would have stopped when the second design was developed.

    If someone could provide the documentation that these cheap cylinders were made by Roskopf, that would largely answer the question. However, even if they were, the centerless movement will remain the "Roskopf" watch.

    I reviewed Schaeder's book for the Watch & Clock Bulletin and noted that it is mostly a compilation of material from other secondary sources. I would want to backtrack the references to the cylinder design in question to be sure it was Roskopf and not someone else's attempt to compete with Roskopf using a more standard design.
    Tom McIntyre Click me.
    If you don't learn to laugh at trouble,
    you won't have anything to laugh at when you're old.
    Will Rogers

  7. #7

    Default Re: Georges-Frédéric Roskopf. Prototype. (By: Tom McIntyre)

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    Thanks, Tom McIntyre.
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    History and Design of the Roskopf Watch by
    Eugene Buffat:
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    CYLINDER:
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    . As for the escapement, it was initially to be the cylinder. But a little later, and on the
    advice of Mr. J. Grossmann, of the school of watchmaking in Le Locle, he thought of using the pin-lever
    escapement, which ended up being called the Roskopf escapement and under which name it is more
    commonly known nowadays.
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    3. 1 ébauche model to be followed exactly, with a lever porte-échappement and a cylinder porte-
    échappement;
    4. 1 calibre with steel points;15
    5. 3 drawings of the calibre of this ébauche:
    a) that of bottom and top plates with the 3 pillars, the barrel hole and a small hole at the
    edge to be used as a reference mark;
    b) that of the porte-échappement with cylinder escapement;
    c) that of the porte-échappement with lever escapement.
    The mention above of a porte-échappement with cylinder escapement should be noted. It should be
    remembered that before thinking of the pin-lever escapement, Roskopf had adopted the cylinder
    escapement for his simple new watch, and a certain number were indeed manufactured with this
    escapement, which was abandoned soon afterwards.
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    Design: The first watches manufactured by Roskopf were, as we said in the historical part, provided with a
    cylinder escapement, already planted on the porte-échappement plate. But only a few were manufac-
    tured and it is not worth the trouble to speak about them. So we will leave aside this experiment
    which did not have a sequel, to occupy ourselves with the Roskopf watch such as it is known in the
    trade.
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  8. #8

    Default Re: Georges-Frédéric Roskopf. Prototype.


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