Clown, the wonderful French short film from the 60s

A boy lives on the streets of Paris, with a dog, and his artist mother. Clown disappears one day, and a search ends in a misty-eyed reunion, and surprise.
It was imported and shown on PBS in the USA in the 1970s, often at the end of the day's broadcast.
I always thought it was in B&W, but now realize that was just our family TV.
It can also be found here: www.archive.org...
(OCLC n#11184601)