10 Rbl. on 1 Rbl dark blue, vertical pair with normal and inverted overprint (tete-beche), perfect mint never hinged! unsigned! certificate Zirath BPP (2025) "the condition is perfect. these stamps appertain with to the largest rarities of the German occupation issues in the II. world war. ", Michel - ., for a single stamp with inverted overprint already 15.000.-