ca. 1780's, London "Dockwra" Handstamp.
"Penny Post Paid/W/MO" (Westminster depot, Monday) government-type triangular handstamp and small circular "1/O'Clock T" datestamp on back of folded cover to Chamery Lane, mostly clear strikes, Very Fine, this version of the famous "Dockwra" handstamp was used from 1752 to 1794, the original "Dockwra" is one of the first handstamps in the world to denote prepayment of postage at a uniform fee
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