SIPMAZ_110618_105
Existing comment: B IS FOR BISECT

A postage stamp cut in half and used to pay half of its face value.

In the early decades of stamps, senders resorted to this practice when they lacked postage of the required denomination.

For collecting purposes, a cancellation must "tie" the bisect to the envelope to prove that the stamp was actually used to send mail. Otherwise, any cancelled stamp could be cut in half and passed off as a bisect.
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