This picture is from the cover of Xaquin Marin's book 'Malfeito bufón' (Ugly Jester). It was kindly donated by the man himself, who is the Director of the Museum of Humor in Coruña, Spain, as well as a well-known humorous artist and satirist in his own right - and he said this site had been useful to him. :-D
The Museum has a homepage in Galician, Spanish, and English.
You can see some of Sr Marin's work here.