1800 - 1810 MacDonald Set
This set appeared briefly on eBay, then vanished like a ghost in the fog. Through various sources found out a little bit about them after the fact:
"Everything in this set is ca. 1800-1810's MacDonald (unfortunately the stamp on the chanter was erased by whipping, or there was none), the pipes are very close in many if not most details to the NMS MacDonald's and the measurements are consistent with those of other MacDonald's that I have, some identical, others very close. It is definitely one of my most significant finds ever. Hugh C and Pierre B confirm, and Pierre will make a reproduction for two of his customers as the NMS MacDonald's are copyrighted."
As you can see these are ancient pipes, and probably not in the best condition. It would be very interesting to hear the sound they produce!