The scarce 78¢ beluga definitive from 1990 that was reissued in April with a perforation change of 13.1 x 13.1 (vs. 14.4 x 13.8)! It is much harder to find than the regular stamp, which is reflected by its high catalogue value! This stamp is required by most albums, so it is a must-own for many collectors! *Plate blocks with inscriptions were not issued for this perforation variety, therefore only corner blocks exist.