Specimen bottle of jet, 1821 to 1910 Specimen bottle of jet, 1821 to 1910 Materia Medica & Pharmacology 1821-1910
Unconverted non-aerated 18 jet burner assembly from a modern gas fire, complete with regulator, c.1970. Unconverted non-aerated 18 jet burner assembly fro Gas Industry 1970