Sequence of grades 700[basic] 702[middle] 701[best] .
There were also the 720 and 728 these were a 702 grade gun in 20 and 28 bore for the American market . Different customers ordered gun with variants to the basic grade such as 700 with 702 wood , scolaped or scroll back actions ,rounded bodys or differing engraving styles as with barrel lengths and rib type .For instance a 702 with full pistol grip semi beavertail forend and 30" barrels with raised flat rib and blacked action that went to New Zealand .
May I also put to bed the argument about the " screw grip " . Webley's referred to it as a grip nut and although it no longer served a functional purpose was still fitted . It was considered an unnecessary cost to re design and re tool to do away with it altogether.