Standard Guitar Specifications:
Pickups: One "patent-number" humbucker in the neck position with "Patent No. 2,737,842" stamped on the underside (post 1976) and one "patent-number" humbuckers, with a black label ("Patent No. 2,737,842") on the underside. The neck pickup was replaced in the mid to late seventies
Pickup Outputs: 7.40k and 7.42k
Nut width: 1.68 inches (1 11/16 inches)
Scale length 24.75 inches
Fretboard: Rosewood
Number of Frets: 20 'jumbo' frets
Position Markers: Pearl split-parallelogram
Headstock Logo: Inlaid pearl "Gibson"
Truss-rod cover: Two-layer plastic black on white with "Custom" engraved in white
Tuners: Individual Grover Rotomatic with "Stairstep" shaped metal buttons (original Grover Rotomatics replaced in the eighties?)
Bridge: Gibson 'Patent-Number' Tune-O-Matic 'retainer' with metal saddles
Tailpiece: Screwed-on non-adjustable bar tailpiece (three screws)
Pots dated "137 7325" (CTS June 1973) Pots replaced in the mid-seventies

Twelve-String Guitar Specifications:
Pickups: One "patent-number" humbucker in the neck position with "Patent No. 2,737,842" stamped on the underside (post 1976) and one "patent-number" humbuckers, with a black label ("Patent No. 2,737,842") on the underside. The neck pickup was replaced in the mid to late seventies
Pickup Outputs: 7.53k and 7.61k
Nut width: 1.70 inches (just over 1 11/16 inches)
Scale length 24.75 inches
Fretboard: Rosewood
Number of Frets: 20 'jumbo' frets
Position Markers: Pearl split-parallelogram
Headstock Logo: Inlaid pearl "Gibson"
Truss-rod cover: Two-layer plastic black on white with "Custom" engraved in white
Tuners: Gibson Deluxe strip tuners with oval metal buttons (replaced - should be Kluson Deluxe strip tuners)
Bridge: Gibson 'Patent-Number' Tune-O-Matic 'retainer' with metal saddles
Tailpiece: Screwed-on non-adjustable bar tailpiece (three screws)
Pots dated "137 7537" (CTS September 1975) Pots replaced in the mid-seventies

Twelve -String Neck measurements:
1st fret 3rd fret 5th fret 7th fret 9th fret 12th fret 15th fret 20th fret
Width: 1.70 1.78 1.85 1.92 1.98 2.04 2.12 2.20
Profile: 0.85 0.86 0.86 0.87 0.86 0.87