1913 Double-headed eagle black opt Turkey 1909-11 2pa on 5pa ochre, opt INVERTED. VFU. SG see footnote, Mi A3K cat €2000 as normal & inverted should be at least double, so €4000+. Yv 1A(var) cat €4800. Extremely rare. Exp Droese, plus 2009 Ceremuga photo cert. (P) (Image1)

Estimate AU$1,500