Lot 40068 – Patent Office: 7 1/2d Patents stationery group on an album page comprising three De La Rue die proofs

Patent Office: 7 1/2d Patents stationery group on an album page comprising three De La Rue die proofs, one in black endorsed in manuscript “Before hardening”, one in black with “AFTER HARDENING” and dated “23 DEC. 02” and one in orange, plus a Patents For C stationery card with “SPECIMEN” type 15 handstamp, a superb and very rare group.