This is a 2020 custom Martin Style 5K concert ukulele, the pinnacle of ukulele history, in excellent condition, used! Martin was founded in 1833 in Nazareth, Pennsylvania. This manufacturer is extremely famous as the founder of acoustic guitars, having produced many world-famous models such as the Dreadnought and Triple O. Although the manufacturer is now known as a leading guitar manufacturer, it has been producing ukuleles since 1907 and is also a long-established ukulele manufacturer with a history of over 100 years. Martin has released many models, but this Style 5K is the top-of-the-line model. This model was only produced for 18 years, from 1922 to 1940, but its overwhelming presence, featuring carefully selected, top-grade Hawaiian Koa solid wood and gorgeous abalone pearl inlays, continues to captivate many players today. This is a concert model that has been brought back to life in modern times with the help of a custom shop that only highly expert craftsmen are allowed to work in, based on the legendary Style 5K. Although there are some signs of use, such as minor scratches, there are no major scratches or dents that would detract from the aesthetics, and there are no issues with playability, such as a warped neck or a worn nut. It is in exceptional condition, worthy of a top-of-the-line model. In terms of sound, the rich, sweet tone produced by the finest Hawaiian Koa is irresistible. The strings are incredibly bright and responsive when strummed, and the way each note melts into a chord is heavenly. The low range and volume not found in regular 5K speakers are a special tone that can only be experienced with this concert model. The carefully selected materials and the natural reverb emitted from the slightly larger body are more than enough to prove that this ukulele is a superb instrument. No one would doubt the description that this instrument is "the best instrument." This is a supreme instrument that you should definitely try playing in your hands.BODY SIZE: Concert Ukulele FINISH TOP: Gloss CONSTRUCTION: Dovetail Neck Joint BACK AND SIDE FINISH: Gloss BRACING PATTERN:Concert Ukulele SCALE LENGTH: 17 BRACE SHAPE: Non-Scalloped FINGERBOARD WIDTH AT NUT:1 11/22 TOP MATERIAL:solid highly-flamed Hawaiian koa BACK MATERIAL:solid highly-flamed Hawaiian koa NECK TAPER: Standard Taper SIDE MATERIAL: solid highly-flamed Hawaiian koa