The artwork from the 1966 Batman trading card set is so delightfully retro, with simpler character designs, hand painted panels, and less stylized versions of your fav villains, that I hope modern artists and designers take note when going for that retro look in their own artwork.
It's not all about warm and tacky color schemes, Hanna Barbera character designs and outdated fashion, it's the fact that everything is done without using a heavy outline and vector shading to convey form. These beautifully rendered panels by Norman Saunders have a classical aesthetic, and I'd almost forgotten how mundanely human villains faced by the Caped Crusader used to be!
Link