Williamson and Jeffray
These bagpipes are stamped "Williamson" and there is surely a connection to "Williamson & Jeffray" who are listed in Jeannie Campbell's book as making bagpipes between 1948 and 1950.
Both Williamson and Jeffray were employed by Henderson bagpipes prior to this time. Williamson was an apprentice at Henderson's just prior to Jack Dunbar and was known to be an excellent turner.
Jeffray tied-in pipe bags and otherwise made the finished product ready for the customer. Without the stamp (between the cord beads) could these bagpipes be mistaken for Henderson bagpipes? I think so.