The machine cancel is a Columbia, made by the Columbia Postal Supply Co.
The town listings in vol IV of "The Columbia Story" published by the Machine Cancel Society in 1998, show only one Plymouth using a Columbia machine. That would be Plymouth, PA, which used this configuration 1923-26.
It appears as if the stamp has been lifted along the left and bottom edges. I hope this was not done to put a perforation gauge under the stamp. Several ocmpanies make some very nice transparent perforation gauges that can be laid on top of a stamp on a cover to give a very accurate perforation count.
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Posted 11/05/2015 12:29 pm
