• Manufacturer: Likely the Norvell-Shapleigh Hardware Company (NS CO), a distributor that often rebranded tools from established manufacturers like Prentiss. [1
• Model: Marked HD 2, signifying a "Heavy Duty" No. 2 model.
• Vise Type: It is a combination bench and pipe vise designed for industrial or mechanical use. It features standard bench jaws on top and built-in serrated pipe jaws lower in the throat for securing cylindrical objects. 
• Mounting: This specific model is a swivel base type. The long threaded stud extending from the bottom was designed to pass through a workbench and secure with a large "ram's horn" wing nut from underneath, allowing the entire body to rotate 360 degrees. Historical Context

• Era: These types of heavy cast-iron vises were commonly produced in the early-to-mid 20th century.
• Design Origin: Some collectors believe these NS CO-branded vises may be rebadged Prentiss vises, as the casting and overall design closely resemble Prentiss models of that era.
• Usage: Such vises were highly portable for their time; by undoing the single large nut underneath, they could be quickly moved to different job sites or temporarily mounted to any wooden surface with a hole drilled in it. 

Have a bunch of vintage tools listed!!

selling as pictured

more than welcome to pick up at shop in butler pa & save shipping