Just received a 9ct gold cased J W Benson watch with a movement I can't identify. I know Bensons made their own up to WW1 but after that used movements from manufacturers such as Longines, Vertex and Cyma, but this doesn't match any of the images I can find. Stylistically the case is a double hinged case which looks as if its probably from the late 20's or 30's. Hallmarks are a bit unusual as well - still trying to work them out.
The picture is of another watch I googled which has the exact same movement in it but again unidentified.
Any help will be appreciated. It is a lovely watch and I'll try to organise pics shortly.