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After extensive research into the heritage of this visibly unbranded instrument, the consensus of multiple AI investigations is that this guitar is a 70's constructed, Japanese Washburn W400. The most concise of those results are:
The Washburn “revival” period The original Washburn brand dates back to the 1800s, but it went dormant mid-20th century. It was revived in the 1970s by the company that would become U.S. Music Corp. During this revival, production was outsourced to Japanese factories, and that’s when models like the W-series (W-100, W-200, W-400, etc.) appeared.
W-400 in the 1970s The W-400 is part of that late-70s (1977–1981 is the most likely range) Washburn acoustic lineup, which was built in Japan (commonly attributed to factories like Terada). It was designed as Martin-style copies (typical of the “lawsuit era”).
Based on the "Trademark of Quality” label, the construction details of the W400 format, and the internal serial number stamp, this guitar fits the indicators for a late 1970s production example very well.
Noteworthy Washburn reused model numbers later (80s/90s), but those versions look different, with different labels, serial number systems, and construction. This guitar matches the first generation W-400, not later reissues.
AI Conclusion The W-400 range existed in the 1970s, and this guitar is very likely from that original Japanese-made late-70s run, which is actually the most desirable version of that model.
Based on the information above, I am advertising this instrument as a vintage Washburn W-400 Acoustic Guitar
This is a beautiful Washburn W-400 acoustic guitar, a standout example of late-1970s / early-1980s Japanese guitar building — an era known for exceptional quality and attention to detail.
This is not your average beginner instrument. The W-400 was part of Washburn’s higher-end lineup, built during the so-called “golden era” of Japanese acoustics, where craftsmanship often rivaled — and sometimes exceeded — contemporary American models.
Key features include a jumbo body design – delivering a rich, full-bodied tone with excellent projection and depth, the use of high-quality tonewoods – rosewood and spruce, giving a warm, resonant voice with strong bass response and clear highs with decades of natural aging opening up the sound beautifully, decorated with elegant block inlays – a visually striking fretboard with a classic, upscale look. There are gold tuning machines – providing a smooth, stable tuning and a mark of the model’s premium spec. Adorned with multi-ring rosette & detailed binding – refined finishing touches throughout.
This guitar has the character you only get from a well-made vintage instrument — responsive, resonant, and inspiring to play. Whether you’re a collector, a player looking for something with soul, or someone who appreciates the craftsmanship of older instruments, this W-400 delivers.
It also comes with a high-end Breedlove hard case, offering excellent protection and adding significant value — perfect for storage, transport, or gigging.
Condition is very good for its age, with only minor signs of use consistent with a vintage guitar. It has been well cared for and remains structurally sound. Vintage Japanese Washburns like this are increasingly sought after for their build quality, tonal maturity, and value compared to modern equivalents. This is a serious acoustic guitar with heritage and presence — not a mass-produced beginner model.
A fantastic opportunity to own a piece of Washburn history, complete with a premium case.
3+ Star Quality Rated - 565€
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