Here's a pic of my friend Hank in a short coat with "bucket" cuffs, appropriate for a highland gentleman of the 1715 Rising (in which Rob Roy participated) and the following decade or so....



This page has photos of two original short "common man's" jackets found in Scottish graves. It's a pirate website, but the garments are not seamen's, but rather quite representative of the short coats worn by highland clansmen with their kilts:
http://www.gentlemenoffortune.com/Jacket.htm