Boris O’Klein (1893-1985) was born in Moscow from French parents. He returned to France at a young age living in the region of Alsace.  He signed up and served in the French army during the First World War and afterwards moved to Paris where he continued to live until his death.  Boris O Klein became an artist and cartoonist and is best known for his hand-coloured etchings of dogs getting up to mischief. They have become known as the ‘Dirty Dogs of Paris’ or ‘naughty dogs’ because many of the etchings portray lewd acts. Each print was individually printed by hand on specially paper and then (hand)coloured. There are 30 images in the complete set of Boris O Klein “Dirty Dogs of Paris”, two of the popular ones are now on auction. Both are in excellent condition.