According Watercraft on Stamps II by Katherine A. Kirk is the vessel shown on this stamp of Yugoslavia the armed patrol boat PC21 used during World War II by the Partisan Navy of Yugoslavia.
The patrol boats were smaller fishing ships (trawlers and leuts), motor boats with installed armament and part of Naval Coastal Districts of NOVJ Navy. Most of them were of wooden construction only two PČ 7 Osvetnik (Avenger) and PČ 8 Udarnik (Striker) were made of steel as warships. They had improvised armor made of double wall of planks filled with sand or garble. Arming and equipping was done in naval yards of NOVJ Navy. There role beside patrol was liaison, transport of units, wounded, refuges and war material; convoy escort; participated in naval landings especially in sabotage action; made attack against enemy sea traffic; fought against smaller German vessels and participated in anti-aircraft defence of naval bases, anchorage's and convoys. They were also used as minesweepers
She was the PC-21 MIRAN, her details unknown.
Armament: 1 – 40mm, 2 – 20mm, 1 – 12.7mm, 2 – 8 mm and 1 mortar of 81mm.
Crew 10.
Of her war history is given:
11 November 1943 with PC-22 damaged armed boat in Srednji channel.
5-6 April 1944 with PC-22 capture armed boat SAN ANTONIO at Sestrunj.
7-8 April 1944 with PC-22 attack and light damage boats A-302 and A-91 in Vrgad channel.
22-23 April 1944 with PC-22 capture boats GIULIANA and EMILIA in Silba channel.
What has happened after the war with her unknown?
Yugoslavia 1982 8.80d sg2035, scott1582 (I found a photo on the net of the PC-21 and she looks not exactly the same as on the stamp.)
Source: http://www.vojska.net/eng/world-war-2/y ... at/patrol/ http://www.3squadron.org.au/subpages/Dogpaddle.htm
http://www.wio.ru/fleet/yugoslav/partizan.htm