25 Pfg. and 10 Pfg. Hitler on airmail letter from RYBNIK 6. 12. 42 to Romania with OKW-censorship, one-line cancel "return, inadmissible" and enclosure slip of paper "return, in accordance with decree. . . . " with "printed matters. . . . More being a 4 sides (printers mark: form. 52. 20000. VI. 42. Q / 0337. 9869, in the countryman handbook so not listed!) rare!