Cornerstone “Blue Monarch Butterfly” Tenor Ukulele


2020. Preowned. Beautiful Custom Cornerstone “Blue Monarch Butterfly” Tenor ukulele handcrafted with the utmost attention to detail by master luthier Peter Marreiros (previously) in Westminster, California. This gorgeous Custom Cornerstone Tenor Ukulele is truly a wonderful instrument and comes highly recommended in fit, finish, and tone. A career luthier famed for his extensive experience in guitar luthiery, Peter has taken his woodworking knowledge and passion for finely handcrafted instruments and applied this to beautifully crafted custom ukuleles for your enjoyment.


Peter Marreiros embarked on his lutherie journey in the late 90’s. In those beginning years he built a few electric guitars. In 2003 he was inspired to build an acoustic guitar. During this process he realized this was his true passion. The demands of building an acoustic guitar were far greater and spawned deeper levels of creativity and detailed workmanship.  Little did Peter know that same year he would meet legendary luthier, Kevin Ryan where both sons were playing little league baseball together. Their friendship grew and Kevin’s meticulous mastery and artistry became a goal for Peter’s builds. Peter’s attention to detail pushed him to build high quality instruments that were aesthetically stunning, uniquely designed, and embodied a strong musically appealing tone.

Peter’s interest for ukuleles was sparked during a visit to one of his friends in the winter of 2018 and coincidentally a trip to Hawaii in February of 2019 further enhanced his interest for the small happy instrument. Pairing years of guitar building experience with his new found love is what drives this builder to push the boundaries of lutherie with a vision to build a ukulele like no other.

“It is with passion and love that a Cornerstone Ukulele is created. Each of my ukuleles is handcrafted and every instrument is a labor of love and dedication. My desire is for my passion to fuel yours…”

This gorgeous custom Cornerstone “Blue Monarch Butterfly” Tenor Ukulele was crafted from the finest materials. The body was handcrafted from a master grade set of Black-White Ebony wood back and sides with a carbon-dated 3,000 year old soundboard of Sitka spruce. The woods are from Peter’s reserve of premium wood sets for his finest builds. It boasts an elegant bound Gabon ebony wood radiused fretboard and bridge and a solid one-piece wood-stained Mahogany neck for added stability and transference of the vibrations back into the sound box. Gorgeous paua abalone shell inlay on the soundboard, fingerboard, headstock  with a paua shell rosette – this uke is absolutely stunning! Wonderful Blue Monarch Butterfly inlay on the upper bout of the soundboard that was integrated into the rosette with a matching Blue Monarch Butterfly inlay on the sail half-headstock as well. Hawaiian Koa wood flora headstock inlay attesting to the high skill level and attention to detail of this beautiful custom Cornerstone ukulele. In-house aged bone nut and saddle and a 14 fret joint to the body with 19 overall frets to the sound hole. The instrument also incorporates a uniquely designed triple hole side sound port on the upper bout for a ‘monitor-like’ effect by which the sound projects outward and upward toward the player. Jet black Gabon ebony wood top and back binding, end graft, and  a top beveled arm rest for added comfort when cradling the instrument. Professional and custom made Gotoh open-geared machine tuners with white buttons for precise and smooth tuning. String through bridge design for a functional yet elegant feel. A high grade durable polyester finish on the body give it a mirror-like sheen that reveals the natural beauty of the wood while a satin style finish on the neck makes for a smooth and comfortable feel to the touch when playing.

This is a true masterpiece of functional art that is both appealing to even the most renowned professional ukulele musicians and the recreational player alike. A wonderful custom ukulele with a lively yet warm, clear, and balanced tone. Excellent projection with a fully compensated saddle and spot on intonation as well. A highly recommended ukulele for both the professional musician and the ukulele enthusiast at heart. ID220075.

Price: SOLD

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