Ectrodactyly, split hand, cleft hand or lobster claw hand involves the deficiency or absence of one or more central digits of the hand or foot and is also known as split hand/split foot malformation (SHFM), or lobster claw syndrome.
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.