Type: Inscription
Location: Pipe (close to head)
Inscription: Stamped incuse "AIR"
Type: Inscription
Location: Pipe (close to head)
Inscription: Stamped incuse "GAS"
Type: Mark
Location: Head
Inscription: Stamped incuse in script "National"
Type: Mark
Location: Head
Inscription: Stamped incuse "Cutting and welding equipment/ MFC. BY/ National Welding Equipment Co./ San Francisco, CAL/PATENT 1835215/8