essay Entire letter affixed with essay label "1 PENNY/DELIVERY/STAMP./ONE/OUNCE." with usage instructions printed on reverse and inscribed with addressee's details in manuscript, the entire addressed "To the Lords Commisioners of Her Majesty's Treasury, Whitehall", endorsed "Specimen of the stamp for 1 ounce letter while in the possession of the Post Office"; fine. Treasury number 20853/39. Photo