Well, except for the white hose and his lack of weapons, the subject of the photo doesn't look too different from early-to-mid-18th c. Highland clan gentlemen who wore multiple tartans in their portraits. Or consider a recent photo (which I don't have, but which has appeared on this forum) of the Chief of Clan MacGregor, dressed from head to toe in his clan tartan at public events. I can certainly appreciate the variety of it all, since multi-tartan (usually four) is how I dress when in front of the public as an 18th c. Highland Jacobite reenactor.