Kodak Cameras, according to the technical pamflet AA-13

Camera Name                   On the Market          Film Size     Original Price in US$ 
_________________________     _________________      _________     _____________________

Kodak Duaflex Camera          from 1947 to 1950        620                17.25 

Kodak Duaflex II Camera       from 1950 to 1954        620                22.00 
"B" changed to "L" 
for long exposure, 1/1953

Kodak Duaflex III Camera      from 1954 to 1957        620                24.00 

Kodak Duaflex IV Camera       from 1955 to 1960        620                24.50 

http://www.kodakcollector.nl/joomla/index.php?option=com_content&task=view&id=24&Itemid=41
http://www.ordiecole.com/photo/kodak_cameras_history.mht

http://www.kodak.com/global/en/consumer/products/techInfo/aa13/aa13.pdf
http://www.ordiecole.com/photo/kodak_cameras_aa13.pdf

http://www.ordiecole.com/photo/kodak_folding_hawk-eye_camera.txt
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http://www.ordiecole.com/photo/kodak_duaflex.txt