All the famous “harem girl” shots are from an alternate version of Era Lui, Si! Si! (1951)
Per IMDb, “Nude scenes — including one featuring a topless Sophia Loren — were filmed for the alternate French release.” Sophia told an interviewer: “For the French version, they wanted me to have my chest bare. I did not want to but … I was hungry. After the scene, they come and say they must do some still pictures of me with nothing on top. I thought it had to be.”
If that French version still exists, it has never made it onto the internet at all. The rumor is that Sophia’s husband, producer Carlo Ponti Sr., destroyed all the prints of the topless version, so that only the stills remain.
Even the tame Italian variant has been impossible to find for years (I have never seen it), but the Cinema Sirens site, as shown below, did claim to have that version for sale some years ago. I don’t know whether that is still true.