These stamps depict:
- MiNr. 98 — Trakošćan Castle
- MiNr. 99 — Veliki Tabor Castle
MiNr. 98 was issued in two color and perforation variations, one on 28 March 1943 (MiNr. 98 A a), and the other in May 1944 (MiNr. 98 C b). MiNr. 99 was issued on 14 April 1943.