This plaid appears very similar to the Earl of St. Andrews tartan, as shown in The Scottish Register of Tartans. According to the Register, that tartan "was designed in 1930 by Arthur Bottomley, a director of Peter MacArthur Ltd, specifically for the use of Prince George, the Duke of Kent, who bore the title Earl of St. Andrews. He first wore it in 1939 to a Highland Society dinner in London three years before he was killed on active duty in World War II. Although it started life as a Restricted Royal tartan it's said that Marks & Spencer mounted a sales promotion with it in a 1973 campaign and since then it has gradually become the District tartan for St Andrews and the surrounding area. No independent evidence of the M & S claim."