As Mirage83 indicated:
For many years here in the What-Is-It forum, those mysterious shield emblems with an Old-English letter drove crazy. Some folks said they were a "Confederate cavalry saddle-shield." Fortunately, a TreasureNet What-Is-It relic identification helper named Creskol came up with photographic proof of the shield-emblem's true identity. I'm not 100% sure he was the first person to post the correct ID, but he did post the proof. At this hour of the evening I'm too weary to do a search of the What-Is-It forum's archives to find the thread where the correct ID was posted for the first time. Here are the images posted by Creskol.