Zen tambour Custom order #432 from Spike finch at exotic vessels in California. please check his website. he got the tuning from Pantheon steel, (halo) which is f3 harmonic minor from their eight tone circle tuning he painted it blue and copper iridescent patina with a touch of white,there is only one of these in existence, absolutely unique.spike no longer makes the Zen tambour due to ill health so very rare and sort after, a beautiful instrument a work of art. very reluctant sale,please check my feedback feel free to ask questions +447929570554