Machine shop tool // Southbend / Milling / Bridgeport

I bought a lathe and this was in a box of odds and ends. Someone has marked ” rockwell 200 ” on the underside. It appears to be a milling attachment ??? This is all i have for the tool. It weights just under 15lbs.The item “Machine shop tool // Southbend / Milling / Bridgeport” is in sale since Wednesday, January 14, 2015. This item is in the category “Business & Industrial\Manufacturing & Metalworking\Metalworking Tooling\Equipment Specific Tooling\Milling”. The seller is “tincity” and is located in Solon, Ohio. This item can be shipped to United States.