Gibson announced the ES-345T to dealers in May 1959, in the Gibson Gazette newsletter. The new stereo wiring was clearly a huge selling point; the guitar was listed alongside three Gibson stereo guitar amps.
Quite a few new instruments by Gibson debuted in 1959; alongside the ES-345, there was the ES-355T, ES-120T, the EB-0 bass guitar and an entire range of 11 amplifiers.
NEW and first from Gibson..
true stereophonic sound for the guitar
New STEREO GUITAR ES-345T
More tonal effects than ever before!
New "Vari-tone" built-in tone selector... stereo wiring and Y cable
Three-position toggle switch... six pre-set tonalities at each position
Twin pickups in super-sensitive Gibson humbucking design, each with separate tone and volume controls
Mahogany neck... adiustable truss rod construction
Adjustable Tune-O-Matic bridge and tailpiece for perfect intonation
Now - the surrounding sound of stereo comes to the guitar, and music becomes magic... an exciting, thrilling experience for player and listener alike. This new Gibson can produce any sound you’ve ever heard from any guitar. The "Vari-tone" switch produces 18 separate sounds and creates hundreds of voices when coupled with tone controls. Though marvelously versatile, it is uncomplicated... may be used with stereophonic monaural, or two-channel amplifier. The double cutaway thin body jazz construction brings you the finest sustain and tone color with Gibson's low, fast, professional string action. In gleaming golden sunburst finish.