I’m selling my Waltons that i personally tweaked:
Walton C Whistle: 10 euro
Walton Mellow D (D): 10 euro
The tweaked Walton whistles has little chiff, a easier reachable second octave and a softer, rounder voice.
Postage in Europe will be approx. 2 - 4 euro. For US approx. 6.
Send me a pm if you are interested.