Proof The fine selection of first issue types on covers (36), cards (30), wrapper and fronts (5) including 1876 cover registered to Switzerland bearing first printing 10n. blue (2, one applied to reverse) cancelled at Cetinje, 1891 3n. black postal stationery card to Pottendorf bearing on reverse second printing 2n. to 25n. set of seven, 1896 5n. postal stationery cover to Switzerland uprated with 25n. brown and additionally bearing 1895 "AR" 10n., 1892 cover registered to Austria bearing 7n. dull rose (2), and a similar cover to the same address bearing 7n. and 10n., 1898 commercial cover from Scutari, posted at Cetinje and addressed to Cattaro bearing 3n. emerald green and showing Austrian postage due 2Kr. (4) applied and cancelled on arrival. Some very attractive frankings and rare destinations are included. Viewing highly recomended