Wooden box camera with Rodenstock lens

What is this? It appears to be a wet-plate camera, approx. 15-16 inches long and 7-8 inches high and wide. The camera body is not in great condition. The bellows are a little tattered, but the rail mechanism etc. works. There are some small brass plates, perhaps nameplates, on the body, but no identifying inscriptions or labels remain. It may have been modified from the original configuration because of the strange, large ground lens on the back (a viewfinder?). Also the plateholder apparently was downsized from a large format (5x7”?) to one much smaller (3x4”?). The lens was made by Rodenstock, a German optics company founded in 1877. The inscription, as best I can tell, is: "Doppel-Anastigmat Eurynar 1 6.8 f = 12 cm Rodenstock Munchen No. 43228" If the last number is a serial number, it would date the lens to about 1908-10, according to a Rodenstock catalogue. Rodenstock says other company records were destroyed in WWII. Sad.