1. mid-18th century bass drone top. maker unknown.
2. 1776-1790 Bass top Maybe belonged to the Mackays of Gairloch or American revolution pipe from the 84th Regiment, Royal Highland Emigrants.Maker unknown.
3. Bass drone top, possibly two droned bagpipe. c. 1790.
4. Flat combed Macrae
5. 1926 Henderson, cassein mounts
Unknown # 28
OK so this is a picture published as received. More or less demonstrates a progression of styles, although place of origin, as well as date or origin, plays heavily into style.