King, I have a pair of A&N 12's from the 1930's, made by Webley & Scott. I have the entire page from their record book, which lists my guns along with 21 others. Of the 23 guns listed, 18 were from W&S. They did not make all A&N's by any means, but they certainly made a lot of them.
The 712, 720, and 728 were all made for the American market. Actually, they are all 702's that have been given a different serial number sequence (starting with 720xxx, etc), and with 3" chambers in the case of the 720. (Not sure whether the 712 also had 3" chambers.)
By far the most common guns from the post-WWII period were the 700 series. The Brits did their best to confuse us with their model numbers. The basic gun was the 700. The 702 was the mid-grade, and the 701 the top of the line--other than some seldom-seen models made in very small quantity.
