Can you transcribe or get close up photos of any markings?
Barrel length, check with ramrod--IT IS UNLOADED, ISN'T IT!
But stock and trigger guard and hammer close ups.
I know where in Houston, Texas you could go for display and answers.
Local gun shows, local muzzle loading clubs, check around.
It's not loaded, I have figured out it's an original Belgium musket. The government bought 54 thousand of them for the civil war, there doesn't seem to be many around in this good of condition as this one. I found one for sale for $2400 and one for $500.00 so I have no idea what the value is.