Description: Mi.No. 23 left perforation 10 ¾. Created during overprinting of this issue, when a sheet was found with missing vertical perforation. Stamps are then perforated with line perforation 10 ¾., but with different tool. That was noted and all ten stamp was purchased by Zagreb merchant J.V. Colić, who then offered them in his catalogue for 1944. There he have said that there are ten pieces with wider left edge. Stamp is also noted in handbook Wieneke-Kruse page 13 and in Michel special catalogue for Croatia from 2004, page 23 under error of perforation 23A.