According to the Scott book by Crawford and Whatley: "Approximately 85,000 double guns, of which the Model 700 series accounted for one third, were produced by Webley & Scott from 1897 to 1979." That's close to 30,000 700 series guns. A particularly impressive total when you consider that they were all post-WWII production, when the British gun trade was in much worse shape than it had been prior to the war.

Not sure, but I don't believe the 85,000 figure includes guns made for other firms. They must have made a few thousand for Army & Navy alone.