Lot 1310
GB SG U3018 2011 1st colour trial pairs Security opts

Important Great Britain, Including the Steve McGill Grand Prix collection of Machins | S26002
Auction: 11 February 2026 10:30 GMT
Description
2011 1st (NFCP, M11L/MAIL) left marginal matching cylinder ‘D1’ set of fifteen imperforate colour trials in vertical pairs, produced as colour samples following the introduction of the Iriodin security ink, from sheets of twenty-five, in issued and unissued colours (many later used on the barcoded definitives) very fine and rare, a unique matching set. SG U3018

