Mixed franking from 3 Din. With 4 Din. On properly franked domestic registered letter to Valjevo with postal stamp OBRENOVAC / 2 from 23.6.42 as well with censorship seal with censorship stamp 039 / Bgd. With additional date cancel 24. VI, what rare occurs, and arrival postmark from Valjevo, the 3 Din. Postal stamp is as franking rather rare, the cover was folded and is to the margins yollowed, expertized Krischke