I don’t have many old puzzles, but I think this is from the 70s. I bought it at a flea market last summer, completed it on October 10th. The brand is Ricordi Arte, 500 (large) pieces, it’s almost as big as a 1000 piece puzzle. Because the box is square I expected the puzzle to be as well. Caused me a bit of confusion 🙂
Actually, I just noticed it says “more than 500 pieces” on the box. I didn’t count them.
The back of the box: