The Kentucky Oxygen Hydrogen Co. REGO Type XL 2-5/8 Regulator is a vintage welding regulator pressure gauge patented in 1921 by Rego. This unit is designed for use with oxygen and is made in the United States. It is a rare and collectible piece for steampunk enthusiasts and welding equipment collectors. The REGO Type XL 2-5/8 Regulator offers a unique and historical addition to any welding or metalworking setup.