CD,
To your question, I don't know more about the lock makers, but every bit of this rifle and lock look good to me - curious what other students / collectors think? The lock and lock panels fit 1810 plus or minus, and all the mounts, details, color, etc. look really good. Dickert lived to 1822, and was active to the end, so an 1810 +/- rifle fits fine.
We are generally used to seeing straight buttstocks on Dickerts and "Lancaster" pattern rifles, though they vary. Henry, Deringer and others were stocking "Phila" pattern or curved butt rifles like this one, and Dickert with his friends and subcontractors would probably build whatever the customer wanted. Plus the birdseye is different, as mentioned.
Thanks for showing us another fine old rifle.