cover 1917 (20 Jan.) "Tauchbootbrief" (submarine) XU5 addressed to New York bearing Turul 25f. and tied by "BUDAPEST/4" c.d.s., showing framed censorship mark adjacent and with censor label on reverse flap, forwarded to Germany and showing "BREMEN/T.B./submarine/D.O.R." arrival c.d.s. (30.1) on front. Submarine mail covers from Hungary are rare. Photo