So today I found a knife like the OP's at a pawn shop, the owner said an older gentleman brought it and a few others in. I thought it was neat so I bought it.
On the flip out scale its marked
Rabone Chesterman
Made in England
No1205R
The blades are marked:
Ibberson
Made in England
Stainless Steel
On the longer blade, on the same face as the scale markings its marked AG Russell....I wonder when AG Russell made these.
Seemed like a neat knife, and I thought $5 was a good deal for a cool piece.