1914-22 ½d to 1s set of eight, blocks of four, overprinted 'SPECIMEN' (type 23). Unmounted/large part og (mounted on one stamp in each block). Fine and scarce. SG D1s/8s: Estimate £500-£600 (Image)

1937 ½d imperforate imprimatur top marginal block of four, very fine unmounted o.g., with "NPM IMPRIMATUR" handstamps on reverse. Very rare, this magnificent multiple contains four of the six examples released from the NPM archive sale.: Estimate £1800-£2100 (Image)