V199

Common type USA tube/semicond. Arrow Tube Company; Springfield, MA Champion Radio Works; Danvers, Massachusetts Croydon (where?) Hylon (tubes), brand Legion (Tube brand); (Where ?) OK (tubes), S.S. Kresge Co.; Detroit, MI Paramount Radio Tube Co.; Brooklyn, NY Sonatron Tube Company; Chicago and New York Thorola, Winkler-Reichmann Co.; Chicago, IL Trojan (tubes); (Where ?) Van Dyke Laboratories; Newark, NJ