Only one sheet of 20 Lire / 2 Lire was double overprinted. Since the layout of a sheet was 5x4, only 20 stamps could exist with this variety. The most famous of them is the one from position 2 having typical error D instead of A.
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1945 Cetinje local provisional issue, 20/2 Lire, block of four with double overprint. Positions 1-2/6-7. Stamp at position 2 with typical error D instead of A (Демократскд instead of Демократска). Unique item! Certificate Veličković.