Quote Originally Posted by figheadair View Post
Bob Martin's book on the History of the Kilt has the answers and pictures etc.

The BW used to wear a Barrel (Reverse box) Pleat but I think that that came in slightly later.

At whatever date I thought all BW kilts were pleated to stripe?? Again, Bob's the man to ask.
All Black Watch kilts were pleated to the stripe. The Black Watch regiment pleated their kilts to show more blue (every pleat centered on a pair of black lines), while the A&S pleated their kilts to show more green (every pleat centered on the single black line).

Also, prior to the 1980s (I want to say 1984), the tartan for the A&S was woven with a lighter shade of green, which was another way of distinguishing the two regiments. But after that date, the two made their kilts from the same color tartan, so the only way to distinguish was from the pleating.