Special commemorative cards were issued on the occasion of the International Labour Day in 1945 with a complete set of 20 Mostar Provisional Issue stamps affixed to five yellowish toned scallop-edged cardboard cards with five-pointed star and inscription "Mostar, 1. maja 1945" in red. Stamps are cancelled with "Mostar 9" 1.V.45 canceller in black.
The cards are made uniformly and quite accurately. However, there are few with oblique printed inscription.
1945 Mostar provisional issue, commemorative card with oblique printed inscription. Only a few such pieces are known.
