Burner (coal gas) with 44 steatite jets and thermostat element from domestic central heating boiler, c.1968 Burner (coal gas) with 44 steatite jets and thermostat element from domestic central heating boiler 1968
Burner (coa glas) from small water heater, c.1970 Burner (coa glas) from small water heater, c.1970 1970