1803
Thanks for that excellent information and direction, both of you. Without that I would not have understood what I now have.....
I now believe I have a 1803 Harpers Ferry type 1, with a cap conversion. The type 1 was serialized, with 4000 being produced. Later Type 2 had no serial numbers. The stampings are a P with a small eagle and the other is US. The serial is 3080, and has the horizontal marks within the numbers that is characteristic of other known type 1 serialized rifles., plus the font is the same.
This is a truly historic rifle, and I think I will be able to track how it ended up where I found it via family tree starting in the USA. How many serial numbered type 1 1803 Harpers Ferry rifles are left out there, out of the 4,000? Is there a registry?
I still swear there may be an eagle on the Golcher lock - I am still weary about cleaning any of it on any level. I will say to near certainty that this is an otherwise original 1803 with the wood cut in and smoothed out around the new lock, but the rest of the rifle is definately a real 1803 except the cap conversion parts.
I have heard of 1803s that were converted by the Confederates for the civil war, and I have also heard of arsenal upgraded cap and ball 1803s that had been bored to .58, up from .54, to meet 1860s government standards - but I cannot place these scenarios on this rifle as the lock is a Golcher - and I have not measured the bore yet.
Seems to me that all the cap conversions I have seen on the 1803 have retained the original lock plate... but I guess there are a few reasons why someone would need to install a commercial lock, maybe due to breakage or perhaps was sold as a conversion kit - but this Golcher lock is so different from the Harpers lock it makes me wonder what is really going on here being that someone had to work the wood to make it right on the rifle.
I will have the rifle tonight and start looking closer at it......
Here is one for comparison:
http://www.collegehillarsenal.com/shop/product.php?productid=635
And an interesting link to Lewis and Clark using the 1st 1803s, article shows the type 1 stampings etc.
http://asoac.org/bulletins/97_carrick_1803.pdf