1930's Kodak Duo 620 with Original Case Art Deco

Produced from 1934 to 1937, it originally sold for $57.50 [1] (app. $900 USD in 2007). The Duo Six-20 is a 4.5×6 horizontal folder made by Kodak AG in the former Nagel-Werke factory located in Germany, from 1933 to 1940. As the name implies, it utilized 620 roll film. **Untested, with the exception of pressing the button to open the shutter window which "whirred" open and into place. Kodak Duo 620 with 7.5cm f/3.5 Kodak Anastigmat lens The original model is informally referred to as the "Art Deco" model. The top plate is painted black with typical Kodak style 'deco' raised metal geometric highlights. This design is also seen on Model C Kodak folders of the same time period produced in the former Nagel factory, and possibly others as well. Metal parts are nickel-plated. On the right side of the top plate is a depth-of-field calculator dial. The leather backs of the earliest Duos are embossed with Duo 620, printed all in one line, while later models are embossed Six-20 Duo, with Six-20 printed above Duo. The top plate has a folding optical finder, though some f/4.5 models had a simple frame finder without optics, and a key for film advance on the left of the top plate. The earliest of the Duo 620s with painted top plate did not have the single sliding metal plate in the back that cover both of the two film counter windows, but have individual brass covers that rotate on rivets, and it seems that the very earliest have no covers at all. Examples of the original Duo have b