BB: Masks worn by doctors during the Plague. The protective suit of the plague doctor consisted of a heavy fabric overcoat that was waxed, a mask with glass eye openings and a cone nose shaped like a beak to hold scented substances and straw.
This strange image is just one of Black & White Photos That Cannot Be Explained"(naw, this ones easy. The kid is painting a face on the older gentleman, who has male pattered balding. His head is tilted toward the camera is all. Not so odd.