Thanks to all for your replies.
I few years back when I was in London I stopped and provided my serial number along with a few photos and their response was polite but they told me their records showed my number as a WR rifle. They did not show much interest in learning more about this shotgun. I presume this is because it is not of the highest grade. So we have some agreement on the record books from that far back in time. Also as I have studies the geometry of the breech balls, nipples and hammers, there could not have been any flash fences as there is not enough room for hammer clearance.

Here I have added a couple of photos showing the WR proof stamps from the barrels.

Both barrels


Closer look #1


Closer look #2


Slip or two piece breech block. This must be very early in WR design and production. In all of my reading from the DGJ&SS and my library I have not found a photo with this design for the breech block.


Barrels Stub Twist (Am I correct?)