Great Britain 1950-52 ½-2½d (new colours, watermark inverted), SG503/7wivar.
Superb quality unmounted mint with full original gum imperforate set of 5 imprimaturs with 'BPMA' handstamps on reverse, except for the ½d value.
A scarce set of imprimaturs of the finest quality released from the British Postal Museum Archives in 2014.
