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Details
used OK-OL and PK-PL pair hinged together to form the original block of four, grey-black shades showing marked to extreme plate wear, very neat light strikes of the black Cross, margins all round (mostly large); small scissor cut between PK and PL. A very fine and visually stunning exhibition item. B.P.A. Certificate (2001). Photo
Provenance
"Maximus", 1970