1945 GUŠTANJ, Porto provisorium

Stamps of Maribor provisional issue were used internally as porto provisorium before and after the end of general validity. 

1945 Guštanj porto provisorium, letter sent from Ljubljana (29.6.45) to Guštanj (2.7.45) with arrival postage due stamps (24 pf) cancelled with "Guštanj," / "PORTO / -2.7.45".

1945 Guštanj porto provisorium, letter sent from Ljubljana (2.7.45) to Dravograd, forwarded to Guštanj with arrival postage due stamps (24 pf) cancelled with "Guštanj," / "PORTO".

1945 MOSTAR, Souvenir cards

On the occasion of the International Labour Day (May 1st, 1945), the postal department of the National Liberation Committee issued 50 sets of souvenir cards. One full set of 20 stamps was affixed to five cards.

1945 Mostar local provisional issue, complete set on five souvenir cards. Signed Marjanović.

1944 ŠIBENIK, "T" provisionals

Every so often, you will find something interesting that was hidden for a very long time... Recently, I bought items from the ex Zorić collection where there was also a cover with stamps with additional "T" overprints. Most probably a private "experiment", however, it looks like that cover was actually traveled.

1944 Šibenik, local provisional issue, registered letter, franked with stamps with additional "T" overprint, sent loco Šibenik (21.III.44).

Stamps enlarged.

1941 BANJA LUKA, Raised "o"

Two typical overprint errors exist: raised "o" in "Slobodna" (position 10) and "Basanska" instead of "Bosanska" (position 23).

1941 Banja Luka, provisional issue, complete set in block of four. Positions 4-5/9-10. Typical error raised "o" in "Slobodna" at position 10.

Note: if you are not familiar with the raised "o" error, see this.