U.S. Machine Cancel Identifier – Columbia (Killer Bars Greater than 20mm in Height)
Your machine cancel was made by a machine sold by the Columbia Postal Supply Company of Silver Creek, New York. The machines made by this company generate a wide variety of markings. This earlier marking can be confused with those made by other manufacturers: just one of the reasons why this ‘machine finder’ system was devised.
Sorry, I don’t have a picture of this Columbia impression. It would be dated 1906 or later, and have straight-line killer bars taller than 20 mm. If anyone can send me a nice photocopy (or better yet, a scan in TIFF format), I would greatly appreciate it.
There is a bit more information available about these machines on my Machine Web page.
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