D: Three jets of the Monel Ribbon filament type, used from 1915 onwards Three jets of the Monel Ribbon filament type
Unconverted non-aerated 18 jet burner assembly from a modern gas fire, complete with regulator, c.1970. Unconverted non-aerated 18 jet burner assembly from a modern gas fire 1970
E: Three jets with nickel, thin platinum or gold tips, used between 1915-1918, one piece sectioned Three jets with nickel, thin platinum or gold tips