"Sava" collection

**,PA 1/8,

Montenegro, Italian Occupation, airmails with overprint "Montenegro…", complete set, MNH in good quality, constant flaw "1V and X1X" (2 x used 1 instead of I), with exception of the 1 Din. Value. This constant flaw is listed in Sassone alongside the definitive set (premium factor cca. 2,5 x) but is not listed with the air mail set. Sass. € 600,00 ++ (as normal set).