At first glance it was an interesting item, but a detailed check showed that it is a fake - the date on the canceller is not possible. It is before the partisans came to Zagreb and much before this issue was released. The reason for forging is obvious: traveled stationery are much more valuable than non traveled ones.
UPDATE: OK, I could agree with those who allow the possibility that the wrong date is a mistake of a postal employee.
UPDATE: OK, I could agree with those who allow the possibility that the wrong date is a mistake of a postal employee.
Fake or mistake? DFJ Zagreb stationery on eBay.
Why 27.IV.45 cannot be genuine? Because partisans liberated Zagreb on 9.V.45 and
DFJ Zagreb local provisional issue was released on 25.VI.45.