What A lovely Foth Derby! It appears to be a Derby type 4b from around 1934 to 1940. It's the variant with the non removable range finder. I believe it was sold in the USA as a Model II. http://collectiblend.com/Cameras/Foth-C.F./Derby-%28II,-w-CRF%29.html I believe This is what your looking for! Je...

As for me.. It would be depending on the price asked for it. I hate to say it, But I would ask for some more descriptive pictures. At 1st glance looks to me like A Graflex revolving back (RB) http://collectiblend.com/Cameras/images/Graflex-Revolving-Back-(RB)-Auto-Graflex.jpg By the lens board and b...