Finland: 1942, franked airmail fieldpost letter from "GRAZ 13. 2. " with on the back senderãs name of a finn. Voluntary in a SS barracks to TURKU with red single circle postmark "army postal service F " and blue straight-line cancel destination transit cancel "O. Y. INSINÖÖRITOMSTRO RATAS", right with letter cancel over blanking plate going (being a censorship), a little blotched, scarce combination!