Black and red overprints of Croatian Ustascha symbol and new value of 3.50 KN on Italian Imperiale series (1929) stamps: 5c-1.75L airs 25c
& 50c, express 1.25L & 2.50L, postage dues 40c, 50c & 60c. Complete
set of 17, Sass 6-22. MNH with 1973 Marjanović certificate, CV 3.200 EUR. Only 231 complete
sets exist!
For detailed information about this issue I suggest a great book: Croatia Local and Unofficial Issues by Mladen Vilfan.
