I think we need to remember that "off the peg" jackets with a standardized description name for a particular style is a modern idea. In those days, bespoke jackets were the norm,or an adaptation of a second hand jacket that came into the hands of the piper's family. In those days,don't forget, every home would have a more than average seamstress on hand as a matter of necessity,so an individual styled jacket was almost inevitable.