Even from very limited documentation we know that bagpipes were being made commercially prior to 1750. Entries relating to Hugh Robertson, turner, date back to 1767. He is listed in the Edinburgh Trade Directory in 1775 as a "pipe maker" Castle Hill, Edinburgh.
The search goes on for a Hugh Robertson bagpipe. The bagpipes pictured herein are probably close but without iron-clad documentation, I'm afraid we'll just have to accept them for what they are; unknown.