The rifle is a beauty. Thanks for posting!
I'm seeing LEMAN over LANCTRPA (Lancaster, Pennsylvania) on the lock plate.
I don't know a lot about Indian trade rifles, but I'm interested in them. I see corrugated brass ramrod pipes and no entry thimble, as you see on Northwest guns. I did not know these features could be seen on trade rifles, but here is an example. No nosecap, either. The triggerguard looks like classic Leman, but I would consider that capbox lid unusual.
Is the furniture all brass, or mixed iron and brass? Was there a sideplate? I would be interested if there was, and what shape. I can't see a well-defined inlet in the damaged wood.
It would also interest me (and maybe some others) to know some of the dimensions... Barrel length and diameter, approximate bore size, OAL and length of pull to the front trigger.
Thanks!
Notchy Bob