What was the 'shahr-e farang' that delighted children in Iranian streets until the mid-20th century?

• A A puppet theatre mounted on a cart
• B A hand-cranked music box with dancing figures
• C A travelling photographer's backdrop stand
• D A portable peep-show box viewed through lenses ✓

Children paid to peer through the shahr-e farang's brass-rimmed lenses at pictures of wonders while the showman narrated.