Naval Ensign of the National Liberation Army and Partisan Units of Yugoslavia in 1942.
Freivogel, Zvonimir (2000.) Morskie sily zbrojne Jugoslowianskiej Armii

Narodowo-Wyzwolenczej w okresie II wojny swiatowej published in Okrety Wojenne 10(4): pp 40-49. and Reversed flag at patrol boat PČ-21 "Miran", 1944. (photography collection of the Library of Croatian Naval Museum - Split).
Unknown (this file Imbris)