Everyone here has literally seen 100's of this style of rifle. It was made between 1840-1870's, probably closer to the 1870's. The lock is a percussion back action, the lock was never ever a flint lock. The gun never ever had a flint lock on it...ever. It is VERY common lock and gun for the time period. It has been refinished and has had a very poor repair at the wrist. It has a value of probably less than $150. I don't know where you are getting your research information, but you need to start looking at some other sources.
There were probably dozens of C BAKERs making guns over the past several hundred years. This particular C BAKER obviously worked very late in the 1800's. Nobody here is pulling your leg, we're just trying to help you face reality.
