How to Identify a Die Cut Perforation

Die-cut perforations are cut by a metal device to produce perforation-like wavy lines for separating stamps.  Self-adhesive stamps are die-cut.

Die Cut U.S. #4750
Die Cut U.S. #4750

 

Water activated stamps are not and have regular perforations that need to be physically torn to separate the stamps.

#299 is not die cut
#299 is not die cut

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