1922 Pof.DL30B joined bar types, Postage Due - overprint issue Hradcany 40/15h bricky red, upper marginal block-of-6, comb perforation 13¾; : 13½;, plate 1, on pos. 3-5/ 13-15, on pos. 4, 5 and 15 II. types bar; mint never hinged, certificates Vrba and Karásek, superb unique multiple!