Another 6X9 option is the Kodak Medalist. They were made during the 40's and early 50's. They were given to US Naval officers.(posted 8286 days ago)The lens is 100mm f3.5 with a really neat couple rangefinder. The depth of field is given by a very neat dial on the top of the camera. The lens is excellent, the camera is built like a battleship.
There are two problems. 1) The lens is fixed so you are stuck with 100mm. 2) The camera was designed to use 620 film.
There is no solution to 1), but the camera can be converted to 120 by "Photography on Bald Mountain"
Check http://home.pacbell.net/baldmtn
I had a Medalist which I bought with paper-route money 50 years ago. Several years ago, I bought another built in 1944 and had it concerted. It is a lot of fun to use and the huge negative is really nice.
Bruce Karnopp