The Speed-X telegraph name may have originated at Electro Mfg. Co. in Fresno, California, which produced the Electro-Bug. In 1947, Les Logan sold the Speed-X line to E.F. Johnson Co. of Waseca, Minnesota. Some believe that E.F. Johnson manufactured the Speed-X after 1947. The deluxe model 501 has a nickel plated base, and the deluxe keys have a "T" handle that allows the key to be placed on its side and used as a straight key.