Original railroad requirements?

Thread: Original railroad requirements?

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  1. #1
    Member bczolone's Avatar
    Join Date
    Dec 2007

    Question Original railroad requirements?

    What origianlly were the requirements for the first pocket watches to be a "railroad approved" watch?

    Someone is trying to tell me it was the jewels and that the more jewels the more accurate the watch.

    He also said they required a minimum of a 21 jeweled movement for a watch to be considered for railroad approval.

    I don't think this is correct, but I'd like an informed answer to pass on to him and for myself.

    Thanks in advance.

  2. #2
    Moderator sixtysix's Avatar
    Join Date
    Nov 2007
    Just north of Syracuse, NY USA

    Re: Original railroad requirements?

    in 1893, the General Railroad Timepiece Standards were adopted, which mandated the following standards for railroad watches:

    " .... be open faced, size 18 or 16, have a minimum of 17 jewels, adjusted to at least 5 positions, keep time accurately to within a gain or loss of only 30 seconds per week, adjusted to temperatures of 34 to 100 degrees Fahrenheit, have a double roller, steel escape wheel, lever set, micrometric regulator, winding stem at 12 o'clock, grade on back plate, use plain Arabic numbers printed bold and black on a white dial, and have bold black hands..."
    Go here for the complete artical and all your questions will be answered.
    Later, Gary

    We are the caretakers of mechanical art.
    Member NAWCC, National Association of Watch & Clock Collectors

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