"Sava" collection

**,10/17 (12, 13, 16, 17 c),Montenegro, Italian Occupation. Airmails of the Kingdom of Yugoslavia overprinted "Governatorato del Montenegro / Valore in Lire" in black, complete MNH set (few stamps with slight and typical gum imperfections for these stamps), all four horizontal format stamps with the constant flaw "ln" instead of "in", Sass. € 2.000,00.