1st May 1874
perf 10½ (large holes, pointed teeth), wmk "BRIEF-MARKEN", typographed
Printed at the State Printing Works, Vienna
|2 novcic yellow||1||1|
|3n green||2||2||SG2a yellow-green Dec 1874|
|5n rose red||3||3|
|15n yellow bister||6||6|
|25n lilac grey||7||7|
Scott  has an unusually detailed description of Montenego's history, while Gibbons  is decidedly terse.
A theocracy ruled by "bishop-princes" from C16 to C19, it became an independent principlity in 1852 with the first stamp depicting Prince Nicholas I issued in 1874. After WW1, in 1918, together with Bosnia and Herzegovena, Croatia, Dalmatia and Slovenia, it was "absorbed" into the Kingdom of the Serbs, Croats and Slovenes which in 1929 became Yugoslavia.
Govt. in exile
Austro-Hungarian Military Post
|1916 SG-B2||1916 SG-B11||1917 Sc-1N1 SG1||1941 Sc-2N1 SG1||1941 Sc-3N1 SG77|
During WW1, Gibbons lists stamps for the government in exile in Bordeaux (a set of 11 overprints of French stamps, not found in Scott, SG-B2 and B11 shown), and Austro-Hungarian Military Post issues in Montenegro.
WW2 saw Italian and German occupation issues and after the war Yugoslavia was "reconstituted as a democratic federation with Montenegro as a constituent republic" .