The Bogle rifle in the above post was made for Robert McTeer and dates to around 1790-1810. The trigger guard in your original post would date around 1820-1840. That might not seem like much, but it makes a difference. So does the history of the maker.
Joseph Bogle (maker of the above rifle) was born in York Co. PA on July 5, 1759. He moved to Rockbridge Co. VA in 1779. He served in both the PA and VA militias during the revolution. He moved to Blount Co. TN in 1784 or 1785. He died on April 1, 1811. He was associated with the gunmaker John Davidson of Rockbridge Co. VA, and may have learned gunmaking from him. There is similarity in their work.
The Bogle rifle shows characteristics for the early development of what would become the Southern Mountain/Appalachia school of gunmaking. This school seems to have developed before 1820, and possibly as early as 1815. Your trigger guard would be appropriate for the later, fully developed, school 1820-1840. Some on here can even tell you the name of the original gunmaker from who your trigger guard was copied.
If you're new to all this, it might seem to be picking on small points. It's kind of like those old western movies. The one's that are supposed to take place during the Civil War (1861-1865). But the actors are using Colt Peacemakers (model 1873). It does make a difference.
