Triangular punch on the yellow ten-cent, closely trimmed on
right
Two mint examples without any cancellation punches
Cover from 1956 with a round paper punch "cancellation" as
contrasted to the "purple cow" markings
Another 1956 cover with two triangular punch "cancellations"
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Page created 03 August 2009, 0347Z
The address for this page is http://www.qsl.net/kg0yh/brookpunch.htm