Great Britain 1963 6d Paris Postal Conference (Ordinary), SG636var.
A superb unmounted mint, with full original gum, horizontal pair of imperforate imprimaturs showing "white spot in frame line" variety from position No Dot R 19/3, each stamp with a "BPMA" handstamp on reverse.
A unique pair of imprimaturs from the first approved printing sheet.
Exceptional provenance as they were released from the British Postal Museum Archives in 2014. Prior to this they were stored in the museum archives in climate controlled vaults since being printed and are therefore in uncirculated mint condition.
Previously sold by Stanley Gibbons in 2015 for £5,000.
