2016. Complete set (6 values) ”500 Years of British Post” in IMPERFORATE single stamps showing ”Stagecoach (1784)”, ”Mail steamship 'Ariadne' (1824)”, ”Post office in Smith Street, St. Peter Port (1883)”, ”Underground of the Royal Mail in London (1927)”, ”Postal telecommunications tower, London (1965)”, and ”Mail distribution centre, London-Heathrow (2003)”. Mint, nh. In all 6 imperforate stamps.