Davis Scope?

First I was told I had a Carolyn Scope (which no one ever heard of) built in the 30's or early 40's. Then I thought it might be a Marlin built about the same time. Now I'm told it may be a Davis scope. Any one heard of a Davis scope. It looks like a Lyman Target scope with fixed cross hairs and external adjustments on the mount. The cross hairs are adjustable back and forth and the rear eye piece is adjustable with a locking ring. There is a geared adjustment about mid length which may be variable power or another focus....HELP! Anyone know anything about this beast?