As far as a I am aware Webley & Scott never put the actual Model type of the 700 series on the gun. The distinction between models was down to wood and engraving. The first offering of the 700 was a basic version to be kind it was known as the "Plane Jane" though Webley did at one time call it a Keepers model in truth just after WW2 Britain was very short of shotguns of the type the average member of the public could afford that had any reliability, at the time Spanish guns where being imported though their build quality was appalling.
In the first photograph is a very early "Plane Jane" 700 Action Flat and you will" see that it is 21/2" chamber it also has a stock that looked very much like it was a fence post the day before. One thing in this guns favour it was fitted with an English straight hand stock and weighing a little under 61/2 pounds so ideal for carrying all day in the field.
![[Linked Image from i.imgur.com]](https://i.imgur.com/3IZQSl3.jpg)
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in the other photograph is the later version of the 700 with 23/4" chambers
![[Linked Image from i.imgur.com]](https://i.imgur.com/VJ5H3ni.jpg)
In the final Photograph are both guns with the top gun being the 23/4" Chambered.
![[Linked Image from i.imgur.com]](https://i.imgur.com/5JIjWgR.jpg)