Yup, some regimental kilts are box pleated to save material. Black Watch is, I believe knife pleated while others are box pleated. I believe the Gordon Highlanders and Cameron Highlanders kilts were box pleated. I don't have any URLs with pics but I do recall seeing a pic of one kilt with a matching tartan jacket where the kilt had a box pleat center back with knife pleats going toward the front on each side. I think it was a 19th century outfit.