This is one of the most unusual April 1 fish postcards I've ever seen! I don't know if the Paris printing company produced this card as it is or if the sender added the clown die-cut. The images certainly seem incongruent but fish, pig and clown have never looked cuter:) The text says "Encountering this poor orphan, I'm returning it to its own kind." The light background shows foxing and some soiling most notably on the right edge, but no creases. As for the age of this card, I wouldn't feel right saying anything more than pre-WWII. Size: about 3.5 by 5.5 inches.
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