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Great Northern Lamp Chart
In 1919, the railroad published a chart indicating various lamp types along with railroad-designated numbers. The chart also includes instructions for lamp maintenance. This chart has been reproduced by an unknown source, and a copy is posted here for reference. Click on the image at right for a bigger, readable version, but note that the file is about 1MB, so download time on a slow connection may be epic. We don't know of any other railroads that developed their own lamp numbering system; however, there is always the possibility that others did so. Shown below is a Great Northern Railway #9 "interlocking and block signal" lamp. Collectors sometimes refer to this style of lamp with a single lense as a "semaphore lamp". When this lamp was purchased, it had an internal socket in place of the fuel font and a heavy duty cord for outdoor use. This electrification was probably done by the railroad, a fairly common practice when railroads were moving away from combustible fuels for lamps and lanterns. Click on any image below for a larger version.
For more information on this general type of railroad lighting, see the Railroad Lamps page.
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