Have photographed 3 stamps, but have 6 in total all similar, came with a bunch of stamps for Montenegro, but cannot find them in Scott. I have also tried Serbia, but still no luck, so any help would be most appreciated. Thank you. Some are imperf and others not.
Issued by Exiled Gov't in Italy, 1921, Gaeta - Italy, full set have 12 values (0.01 to 5 Perper), overprint in blue and red, perforation 11.
Full set of 12 have an catalog value of 75.00 euro, no postally used exist, as it is issue of Gov't in Exile, no valid for postage in Montenegro.
(information from : M. Radicevic, 2012 catalog).
Exist also imperforated, imperforated with overprint, imperforated double overprint set of 9 values, which have (according mentioned catalog) much higher prices (360.00, 270.00 and 360.00 euro per set of 9 values).