Brand : Rickenbacker - (1932-1950) - Harmony made the very first guitars electrified by Rickenbacker. Most have the old "Rickenbacher Electro" former spelling nameplate. Some others were made by Kay.
Guitars shown below were made by Harmony and sold under the Rickenbacker brand. It doesn't mean that all Rickenbacker guitars were made by Harmony.

• Electro Spanish (1932-1934) - electrified flat top f-holes - Sunburst -  6 Guitar made by Harmony for Rickenbacker. It appears to be the first "real electric guitar" made by Rickenbacker. It wears the "Rickenbacher Electro" nameplate. Open head, f-holes on the upper bout of the body, horseshoe pickup. A tenor version was available.

• Electro Spanish tenor (1933-1934 ca.) - electrified flat top - Sunburst -  3 Four string flat top with 4 parts f-holes on the upper bout. Plain head covered with perloid material. See the six string version

• Ken Roberts (1935-1939) - electrified flat top f-holes - Sunburst -  14 Guitar made by Harmony for Rickenbacker. It wears the "Rickenbacher Electro" nameplate. Perloid headstock, horseshoe pickup. The neck has 17 frets out of the body !

• Spanish (SP) (1946-1950) - electric archtop - Sunburst -  18 F-holes on upper bout, horseshoe pickup, block fret markers, volume and tone white knobs controls.

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