Great Britain 1961 1s6d Centenary of Post Office Savings Bank imprimaturs, SG625Avar.
A superb unmounted mint, witu full original gum, imperforate bottom right hand corner marginal cylinder block of four imprimaturs “Cyl. 2E-2C" with "BPMA" handstamps on reverse.
A unique philatelic extract from the first approved printing sheet.
Exceptional provenance as it was released from the British Postal Museum Archives in 2014. Prior to this it was stored in the museum archives in climate controlled vaults since being printed and is therefore in uncirculated mint condition.
SG Catalogue Value: £10,500.
