All are high D and are fine whistles without issue. I mostly reach for a Burke so these aren't being properly put to use. Prices include shipping CONUS. Trades are possible. Looking for Lofgren,Tilbury and Burke or delrin equivalents or lower key metal whistles.
Milligan $135
early Busman $135 Sold
Hoover $50 Sold
Hoover narrow bore $50 Sold