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Heavy parallel bars struck across a stamp.
Also known as: Obliterator cancellation, Bar cancel, Duplex killer
A killer is the heavy barred portion of a cancellation, struck across a stamp so it cannot be soaked off and used again. It is the part that does the defacing, as distinct from the dated circle beside it.
Defaces a stamp so it cannot be reused, the bars being the obliterating half of a cancellation.
Contexts: History
Is paired with a dated circle in a duplex handstamp, the two halves doing different jobs: one defaces and the other records where and when.
Contexts: History
A block of heavy parallel bars, usually oval or rectangular in outline, struck across the face of the stamp.