optimus 123In 1955, the company, then known as Sievert AB, introduced the 19-ounce Svea 123, considered the first lhtweht, compact backpacking stove. Two years prior, OptimusThe Svea 123 is a small liquid-fuel (naphtha, commonly referred to as white gas or Coleman fuel) pressurized-burner camping stove that traces its orins to desns first pioneered in the late