Maynard - Gala Dress for Jeanne Lafaurie Fashion House (1946)

Of course this isn't a comic related artwork :)
But I loved it at first sight, since it's a very stylish image, which
reminds me of the glamorous movie stars from that era.

I don't have a clue about artist's first name and biography. I guess he was French and I found he worked for fashion houses and advertising industry between '40s and '50s (see additional images)...
Any further info will be greatly appreciated, thanks!

(mixed media on board, roughly 12,5"x 17,5" - signed and dated)