Our cousins across the Pond did their best to confuse everyone on the numbering system for the 700 series guns. The 700 is the basic model. Next in line is the 702. Top of the line is 701.
Then there are the 712s, 720s, etc. Those are 702s made for the American market. I thought they were the only 700 series guns made with 3" chambers. But this gun is not a 720. The 720s all have a SN that begins with 720. Can't tell from the photos whether it's a 702. If it is, the stock should have drop points.
