Hi Simon,
I agree with Mark's post 100%, it's a HSS superflute gouge. HT did use the light colour handles to indicate tools were carbon steel. So as you bought it second hand, this would suggest / confirm to me your handle is not the original handle. Perhaps the original dark stained beech handle was damaged at some time. So no need for concern
.
Below text is taken from a HT tools brochure.
The colour of the handle readily identifies our turning tools. Carbon steel tools are readily identified with the hardwood yellow tone handles, high speed steel with dark stained beech handles.
Turning Tool Handles
Carefully designed and finished in English hardwood. Turning tools can be supplied with or without handles.
Prefix T- Carbon Steel Prefix
HS-High Speed Steel[/right][/pre]