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1974 Greco JB-550 Vintage Jazz Bass Mahogany w/ Power Booster, Japan Fujigen


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Up for sale, a 1974 Greco JB-550 in exceptional, 100% original condition and in perfect working order. This unique “lawsuit” era Greco was produced for just a few years in the early ‘70s, featuring an active “Power Booster” circuit, located beneath the pickguard.

The body is crafted from mahogany with teak veneers on front and back, and a maple neck and fingerboard round out the tonewood complement. Weighing 9lbs 11oz, this JB-550 has plenty of natural sustain and sonic authority on tap, with the treble immediacy of the maple fretboard faithfully captured by the single coil pickup pair. These pickups deliver an array of classic Jazz Bass-style tonalities, with a upper midrange-centric burp and focused growl at the bridge and wider, smoother sounds at the neck, particularly with the Tone knob rolled off to taste. The active “Power Booster” two-way switch enables a huge surge in volume, driving an amp hard. This JB-550 has been professionally setup here at Mike & Mike’s Guitar Bar with 45-100 roundwound strings, comfortable action, and accurate intonation.

Neck Specs:

-Wood: Maple
-Shape: Slender U, full shoulders, measuring .780” 1st fret, .900” 12th fret
-Fretboard: Bound maple, faintly rolled binding edge, block inlay
-Frets: Medium fretwire, pristine
-Scale Length: 34”
-Nut: 1 9/16”, bone
-Headstock: “Gneco” block logo
-Tuners: Clover button

Body Specs:

-Pickups: Single coil pair
-Harness: Untouched solder, 500k pots
-Hardware: Chrome-plated control plate, bridge with barrel saddles, and “G” “ashtray” bridge cover
-Plastics: Three-ply pickguard with Off/On text for “Power Booster” switch

The gloss Walnut finish highlights the grain in the teak veneers on the top and back, and cosmetic wear includes faint buckle rash on the back at the belly contour, some minor dings along the lower bout perimeter, and a handful of light marks on the back. The smooth ambered gloss on the neck profile is flawless.

The original faux leather gigbag is included.