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Washburn built the J600K as part of its Jazz Series hollow body electric line, positioning it as a full-featured archtop-style instrument aimed at players seeking a traditional jazz voice.
The body pairs a spruce top with flame maple back and sides. The hard maple neck carries a rosewood fretboard with 20 frets, MOP block inlays, and a 43 mm Graphtech Nubone nut at a 25.5-inch scale. A single vintage mini humbucker drives the circuit through a straightforward one volume, one tone layout with a three-way toggle selector. Hardware throughout is distressed brass. The bridge is an adjustable ebony unit fitted with a bone saddle, and tuning is handled by Grover Exclusive 18:1 machines in black. The guitar ships strung with D'Addario EXL120 light-gauge strings and the finish is a vintage matte. The case listed in the original spec sheet is a GC78.
Owners seeking replacement parts — particularly the ebony bridge, Nubone nut, or Grover tuners — or requiring setup and intonation work should consult a qualified luthier or guitar technician familiar with hollow body archtop instruments.
Nothing in The Vault is for sale. These records exist so the instruments stay documented after the manufacturer moves on — and the most useful part of that record is what owners add to it.
The catalog shot showed one finish, under one light, a long time ago. Yours has been played. Photos from owners are what the next person finds when they are trying to identify a part, match a finish, or work out whether the one they just bought is really what the seller said it was.
Specs only go so far. What actually fits, what breaks first, what the factory got right and what everyone ends up changing — that lives with the people who own them, not in a datasheet. Post what you know and it stays on this page for whoever comes looking next.
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From spec questions to full builds — players who have lived this gear since 2007.
Since 2007
