Yes it is a LOW D whistle as also recently used by Davy Spillane in the RIVERDANCE show. I personally play a Chieftan LOW D whistle, these are made by an ex-employee of Overton's who made the original Alloy LOW D whistles. As it happens I am in the process of making myself one in wood (Pear wood)being a bit of a wood turner on the side. A good link for LOW whistle info is : Bev Lawton