Hi, here are some images of an Optimus 1S,L stove I am working on at present. This particular model dates from the 1930s and is a 2 pint, kerosene-fuelled, collapsible stove, fitted with a roarer burner. The storage box has had a hard life but I have at least neutralised the rust. The "reserve" cap is parked on the pump knob when not required on the tank. The stove is fitted with ornate "claw" feet: As with many early stoves the quality of the lettering is excellent: Regards, Kerophile.