Drones that look to be mixed cocuswood and blackwood, with celluloid (“French Ivory”) mounts, rings and bushes, and nickel ferrules. A delrin blowpipe with resin ivory mount was made to complete the set during restoration by Burley Bagpipe Co. of Penticton, BC. The stock ferrules were replaced with new nickel because they were cracked at the seams and would not take brazing sufficiently enough to be stable. These drones have been tough to definitively identify, but the consensus by those who own similar sets is that they were built in the shop of John & James Center before they sold to Robertson and emigrated to Australia in 1908.