This Henderson bagpipe has silver that was tested and hallmarked in 1931. The story was that it was made for the Glasgow Empire Exhibition in 1938 and was acquired by a piper sometime thereafter. Following WWII the bagpipe changed hands and wound up in Detroit Michigan where they were played until about 1990. They surfaced recently and are now with a trusted piper in the Detroit area.

I was not able to find anything about this particular set however it seems that Henderson may have made a small number of carved bagpipes, the whereabouts of most being unknown.
Henderson - Carved