Isn't that the job imported by Cleveland Automatic Machine Co.? Cleveland Automatic was a screw machine builder in, guess, Cleveland. It was bought by John Lenz of Dayton OH. John Lenz is the inventor and pantent holder for the o-ring sealing hydraulic tube fitting and somewhere around late 40's early 50's he bought Cleveland Automatic. I don't recall if they were in Cleveland or if Lenz moved them to Cincinnati but while owned by Lenz they were on Spring Grove Ave in Cincinnati. I reckon Lenz purchased them to produce his fitting line, or perhaps they were ripe for the picking after the war contracts cancelled and surplus sold.
http://www.lenzinc.com/content.cfm?form_template=about
Out of the Cleveland Automatic line came their large screw machines (and they were big) and a whole series of die casting machines, both cold and hot chamber, from 50 up to advertised 1000 ton locking force. They attempted to expand into chipcutting with a series of milling machines and they looked like adequate machines from the #2 to #5 size Cinci's. I last saw new ones on their floor in the early 80's and they looked like they were 20 years old then, so I would put them to be produced say from 1960 - 1970?. If I recall right they were Italian or Spanish. Had knobs that looked oddly similar to the Cinci green aqua plastic with flatted top that Cinci used in the sixties. These 4 or 5 machines I saw looked like derilects that were canabalized. There were also MANY large screw machines scattered about the building. I believe, though, the milling line was an imported product that they half heartedly sold and as they are long gone they have no support. However who they bought them from may interchange and those here more versed in worldly machine tools may recognize a similarity from a pic.
All of the Cleveland parts, fixtures, patterns etc are gone or sold off and there was a used machine dealer in the building named Rudy Skoff (RMS).
Edit: After re-thinking this, it wasn't til perhaps the 60's that Lenz bought Cleveland Automatic (Camco, a contraction for Cleveland Automatic Machine Co.), and perhaps it was a last attempt by Cleveland to expand their product line to start offering the mills. Lenz still owns the humungous Spring Grove building with many tennants and perhaps parts are squirreled away in there somewhere!!