The Webley & Scott catalogue that I have for 1967 and has "American Tradditional Design" printed on the cover.
As only the English would know their numbering system for the 700 series is a little different.
briefly the go in this order
700 plain Jane
701 Delux
702 middle of the road
710 28 gauge I have also seen listed a 728 as a 28 gauge which stands to reason but this numbering system has no reason

The 700 has a straight hand stock 2 triggers hand engraved English scroll engraving.
the 701 pistol grip and beavertail forend single trigger fully engraved
the 702 prince of wales stock and beaver tail less engraving than the 701 bot more than 700
701 & 702 had a gold oval in the stock 700 had silver.
you could have any option on any gun as long as you paid including 28" or 30" as long as you paid.the catalogue gives you the option of 12 or 20 ga or 28 ga in the 710 but my gun is a 16 ga made in 1957.Either the Americns could not be trusted with a 16 Ga or they were deleted from production but they are not mentioned in this catalogue.
good shooting
sbs470