Ljubljana provisional issue was released on June 7th. I have not seen a commercial shipment cancelled on June 7th or 8th. Most likely, the stamps were not available in the post offices until June 9th ...
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1945 Ljubljana provisional issue, registered letter, franked with 2.5 Lire (1 Lire for the letter + 1.5 Lire for the registration), sent from Ljubljana (9.VI.45) to Osijek (16.VI.45) and redirected to Zagreb where it was censored. Very early cancellation.