There is a large range of different types and subtypes of the 1945 Split postal stationeries - three main groups, several types and subtypes exists. Below are two of the most common: 2/IIa (group 2, type II, subtype a).
For details I recommend a book by Mladen Vilfan "1945 Provisional Issues" and its supplement edition.
1945 Split local provisional issue, postal stationery, type 2/IIa, sent from ISLAND Korčula (25.V.1945) to Dubrovnik. Rare censorship stamp "CENZURIRANO Br. 16".
1945 Split local provisional issue, postal stationery, type 2/IIa, sent from Kaštel Stari (21.VIII.1945) to Hreljin.