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.