MacRae, Duncan
MacRae bagpipes were made in Glasgow from 1897 to 1952. The company was started by Duncan MacRae, who was an innovative man and patented several novel inventions for the bagpipe. The hempless metal tuning slide, the chanter grip, the tunable bass top and a stock with a wooden nut to eliminate the need to tie a hide bag in.
Duncan died in 1930, his son James ran the business until his death in 1951. The business was sold to the firm Grainger and Campbell in 1953-54.
Thanks to John M for the pictures below of his cocus set of MacRaes. They were ID’d by Jeannie Campbell.
Pictures below of the full silver set are courtesy of Cameron Bell of Professional Bagpipe Services, Australia. He owns this set which used to belong to PM Willie Gray.

Full silver MacRae's, made for PM Willie Gray by Duncan MacRae around 1919. Note the lock nuts on the bottom of the stocks
Did McRae ever produce pipes where the drones screwed into the stocks? Did the stock nut screw on to the stock rather than as pictured above screw into the stock? Cheers for any help.
Super instrument , j’en ai restaurĂ© une ;un son exceptionnel.