It's flaring tool. The flaring dies revolve in the frame, and are locked tight by a cam action when pressure is applied to the movable handle.
The same type of flaring tool is still sold by Superior Tools as the "Papco" style flaring tool.
http://www.superiortool.com/pdf/FlaringTool.pdf
Rothenberger Tools also sells the same style flaring tool. The newer version uses a different flaring cone and frame design, but the older Rothenberger one were the same as the Papco tools.
http://www.rothenberger-usa.com/en/products/-/39-roflare-revolver-revolver-reeling-flaring-tool/
The Rothenberger version is made in the USA so I presume the Superior version is as well.
The trademark for Papco was owned by a Canadian company called H. Paulin & Co. and later the Hillman Group. Rothenberger had a Papco trademark for tubing cutters and flaring tools, but the trademark is currently listed as dead.