It has NRS1 cut, which is also referred to as the ‘wave’ headjoint.
SANKYO Silver Sonic Flute Solid Silver 900 Fully serviced New Pads
Prima Sankyo Etude Flute – Sterling Silver Headjoint (.925) – Made in Japan
Sankyo ETUDE Flute Silver-plated nickel silver Used with Hard Case Soft Case
Prima Sankyo Etude Flute Silver Headjoint Cleaned & Tested Case Made in Japan
GEWA Mandolin F-2 Premium - Solid spruce top - Solid maple back/sides - Flamed back - Incl. premium case - Vintage sunburst high-gloss finish
GEWA Mandola Pro Arte Antique - Flat mandola - Portuguese shape - Solid spruce top - Solid maple back/sides - Antique satin finish - Made in Europe