MR2 var (92w) 1918 1d carmine (aniline) K George V overprinted "WAR TAX" SG Type 10 at Nassau, perf 14, VARIETY - wmk MCA inverted, an exceptional used rarity, the first example we have ever seen (quite common mint--Stanley Gibbons seems to agree as it is listed but unpriced used)!), lightly canceled, with left sheet-margin.
