Description: Provisional stationery sent from camp Danica in Koprivnica to Banja Luka 04.06. 1941. On arrival censored which is visible from cancel in black color CENSORSHIP described in Pervan Zrinjšćak on page 34/35. Readressed to Bosanski Aleksandrovac (arrival cancel). Bent horizontally and vertically, because the detainee of the camp could probably hold it only that way until sending. Very rare.