Does this bagpipe look familiar?  In 1923 Mr. Alexander Ross of Kiltarlity Cottage, Beauly, Invernesshire was granted a Patent for "Improvements to and Related to the bag pipe."

He turned to his long-time friend James Robertson to build that bagpipe. The drones of this bagpipe are fitted with practice chanter reeds and the bores are such that a unique sound is produced. It is not known how many of these bagpipes were made by Robertson, but we do know that this same profile and some of the same detail can be found on Robertson Great Highland pipes made during that same time.
Alexander Ross