Two things you need to know regarding the letter below: first, the usual letters are much rarer than registered, and second, missing censorship is known fact for the last period of validity in June 1945.
1945 Mostar local provisional issue, letter, properly franked with 80 kn, sent from Trebinje (12.VI.45) to Zagreb. Missing star on upper right stamp. Certificate Vilfan. This is the only cover with a stamp without a star known to me.
Overprint error: missing five-pointed star on 20 kn / 5 kn.
