The auction description frankly pretty much says it all, although George's article had fairly specific measurements. I'm not sure if Bob's Moravian book offered the same measurements or not as I loaned it to someone and never got it back.
I know I still have a copy of the article somewhere - it was in two parts - but it's probably very 'worn' or crumpled like an old dollar bill.
The key thing to remember about this rifle, which you will note in the auction description, is that you will see copious and use of the word, "probably." It's unsigned. I'm not sure who was the first to attribute it to Albrecht although I think George's article was the first to put it in print (I think it was, "Andreas Albrecht's Lion and Lamb Rifle" or something like that). When the 'griffin' rifle signed by Oerter turned up, a number of people began to question the attribution which is perhaps splitting hairs. Who knows.
Speaking for myself, I find the short cheek more characteristic of what is seen later (than the '1760' mentioned in the auction description) in Oerter's dated work, and later work in the Northampton area. Unfortunately there is really nothing dated to the 1760s in the Northampton area to use as a basis for comparison. I find the concept that the rifle was "outfitted for War" fairly compelling and self-evident, though, so it clearly appears to be a pre-War gun that was modified. By the original maker? More questions!