Very clean pre-war Zeiss Ikon Contaprox closeup assembly for use with Contax lla rangefinder camera. Beautiful German craftsmanship of the highest grade. Has the 563/04 helical close focusing mount with tripod attachment boss and the special Carl Zeiss Tessar 50mm 3.5 macro lens made at the Oberkochen factory, two 5522/13 extension tubes, the 5520/6 focusing screen and the 1251 viewing hood and lens cap.. Very clean assembly. for macro photography. The focusing ring operates smoothly and correctly. The aperture ring operates smoothly and correctly. The lens has some haze in it