Nautical Signal Flag of Letter "S" in Shadowbox Frame

International maritime signal flag of letter "S", "SIERRA", set into a shadowbox frame. The cotton flag has a white canvas hoist with a sisal rope and wood toggle, with a maker's label from American flag maker "Annin", the oldest flag maker in the United States and known for high quality and durability. The cotton field is white with a dark blue square pane and the signal for this signal flag when hoisted alone is "My engines are going full astern". Mounted on a beige matting mounted to a plywood backboard and shadowbox frame. 19''H x 25''W x 1 3/4''D