cover 2Kr. orange-yellow, uprated with Engraved 3Kr. green and addressed to Serbia (arrival c.d.s. on reverse), cancelled by "KUBIN" c.d.s. (28.5) and showing Pancsova transit c.d.s. alongside. A very rare example of the overpayment of 1Kr. of the special 4Kr. rate to Serbia. Simády 5. Rare. Photo