In the 20th century the Scottish Highland regiments have universally worn the "Mary Jane" style buckle brogue with diced full hose. But in the 19th century they wore slip-on shoes with nonfunctional buckles, without the strap:



I decided to go with something like that. I got ordinary modern loafers, cut off the flaps, and affixed buckles:



Both styles, the slip-on loafers and the Mary Jane, appear in The Highlanders of Scotland along with a number of styles which no longer exist.

One interesting shoe which appears in The Highlanders of Scotland also appears in this Highland Dress catalogue from1930, cut much like a Mary Jane but laced across the opening: