Tool, Gun Sight, Elevation Calibration, U.S.N., circa WW II

Purchased from the estate of a retired Commander Navy from WWII....he collected nothing but the best and most unusual and this is the only elevation gunsight that Tony has ever seen for sale. Guns move left and right - called training - and up and down - which is called pointing. This is a point gun type, up and down elevation. And, it's the only one he's seen in 15 yrs.