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, OptimusHowever, Optimus introduced the Svea 123 in 1974, according to Doug Weise. I reported that the Sv. 123R is listed in the 1976 catalogue as that is the nearest date to