Note
First products. (QST, Jul 1962, p: 123)
Began selling factory direct in early in 1971 (QST, Feb, 1971, p. 107)
Swan announces it will discontinue production of tube-type radios. "16 years of continuous production totaling 55,000 radios." Doesn't say whether this number includes just the 350 series, or all of the tube type rigs. (QST, Aug 1979, p.126)