"Straight from the Leitz Museum archives in Wetzlar! A unique piece of history! A very early M4 Prototype "Betriebskamera"! As you know, cameras for testing were often disassembled for further scrutiny. This one is a very nice example and sure will grace your collection impressively. Comes with a handwritten document by someone who should know,- serving as proof of authenticity. Will be issued to highest bidder! Lens and bottom not included in sale. Please ask questions before bidding and Happy Thanksgiving!