Unfortunately, nothing else on the musket match a Pattern 1809. The other indicators on the musket seem to predate the lock but i am not sure. Any help would be appreciated.
I have Bailey's British Military Flintlock Rifles 1740-1840, Neumann's Battle Weapons of the American Revolution, and Goldstein & Mowbray's The Brown Bess and have tried researching online but I don't see anything like this and i am at a loss.
Length - The overall length is 69 inches and the barrel length is 52 3/4 inches. I see this length in American fowlers or French Buccaneer Naval muskets but i see references to possible English wall/naval guns being made in lengths longer than the Pattern.
The side plate is a three screw flat plate (the third screw only attaches to wood). I believe the English went to a two screw plate in the early 1700’s but plates with three screws continued to be used into late 1700s on trade arms and by other countries into the late 1700s.
Trigger Guard - Every photo I see shows English military flintlocks have a lower screw to pierce the stock wrist and secure an escutcheon plate. As you can see this one does not have the lower screw. However, American musket examples from the 1750-1780s don’t show a lower screw. I also noticed the absence of a sling swivel which may indicate more like naval or wall guns.
Brass Butt plate - the style resembles flat sea service examples used 1750-1790.
Stock shape – the flat bottom of the stock resembles naval examples.
Barrel markings – Barrell markings indicate British ordinance (1) London Company Gunmakers Proof (2) Tower Arms Crown and broad arrow, (3) inspector number's mark 11 or possibly 17. I think dating the barrel marks would be my best indicator but the marks are pretty worn.
David