No idea of the maker of this two part tunable low whistle in D. 22 3/4 inches, 577 mm, long. I bought it second hand around twenty years ago and have rarely played it since then. It is finely made as I hope the many photos show. I’d love to know the maker but there is no name anywhere other than the letter D for pitch. Maybe the photos will help someone identify it. I’ve never played another so I’m unable to compare it for sound quality but it is deep and resonant. No reserve, no buy it now and the auction will run to the end.