Champion & Wilton Silver Plated Sandwich Box in Leather Saddle Pouch. J. Yates & Sons, Birmingham.Silver Plated Sandwich Box in Leather Saddle Pouch.. Retailed by Champion & Wilton of Oxford Street, London who were saddlers & harness makers to the King. The sandwich box is double hinged and is of a smaller size, possibly for a child. The sandwich box is marked for J. Yates & Sons of Birmingham. This probably dates to circa 1920's to 1950's. In excellent order with moderate surface wear to the silver plate. The leather is in excellent order.