Proof 8a. (3), in deep purple, in bright blue and in light brown, imperforate, recess-printed on thick wove paper and perforated "SPECIMEN", Samuel Type B1; fine and very rare. Photo

Details
Proof 8a. (3), in deep purple, in bright blue and in light brown, imperforate, recess-printed on thick wove paper and perforated "SPECIMEN", Samuel Type B1; fine and very rare. Photo
Provenance
Printer's archive, Christie's Robson Lowe, September 1986 and July 1987 (£495, £605 and £605)