Great Britain 1965 4d-1s3d Churchill Commemoration (Phosphor) imprimaturs, SG661/2pvar.
A very fine unmounted mint, with full original gum, set of two imperforate imprimaturs with "NPM IMPRIMATUR" handstamp on reverse.
A very scarce set of imprimaturs from the first approved printing sheet.
Provenance: National Postal Museum Archive Sales 1984/5.
SG Catalogue Value: £4,000.
