1836 Needle Gun - Dreyse Faucet Breech Rifle - Info WTD

I just picked up another very unique collectable and I'd like to know if anyone has any info about this type of rifle. I did find the article on the net titled "The Dreyse Faucet Breech Rifle" by Larry B. Schuknecht, but I would like any additional info that might be found on these. Perhaps another member has one, or has experimented with one.

I'm anxious to try shooting it.

Here are some pictures ... As you can see, condition is very, very good, an mechanically its 100%.

Only markings I find are the caliber, the load, serial number(s), a unknown Gothic Letter on the left side just ahead of the Faucet lever, and a few inspection letters,i.e., "R" "6" (or 9). And, as the last photo shows, a scaled sketch on the bottom of the barrel side flat that shows the firing needle length in case a new one has to be made.

Your comments are most welcome.