We now (June 2023) have just TWO of Keith Glowka's Moon Flutes. Three are bison horn, polished, balanced, tuned. One is just jet black bison horn and one is a polished and tuned Blesbok horn. I'm learning to play that one..and the tone is beautiful and haunting.
These may well be the last "Moon Flutes" - bison horn caps sanded, polished, inlayed with turquoise chip ... and perfectly tuned to a five fingering hole for producing the six note native scale. The key of each flute is determined by the natural horn size.
These flutes play perfectly; we've had a couple of try masters on the tuned flute show us how they can be made to sing.
You won't be disappointed ... and they are museum quality pieces to boot! With hand made storage bag.