1933 Leica III (F) in the rare black enamel and nickel version. This is the first Leica to have slow speeds, which is on a separate dial on the front of the camera.  Eyelets for carrystraps and a diopter adjustment on the rear viewfinder window were also added to this model.  This example has the equally rare Nickel version of the Summar f2 / 50mm lens first introduced in 1933.