My original tumblr post was here. These images were originally posted on tumblr by scrap paper boudoir and attributed to “lao-wa.” “Lao-wa” is the French artist Olivier Vatine, who has a DeviantArt site here and a professional site here. These images come to us via nerdstuff45.
Would’a taken the top picture to be the work of Moebius—at least it’s in his style and has one of his characters in it…
I certainly thought of Moebius as well looking at the first picture, but after some head-scratching decided to preserve the original poster’s attribution.