This is the General Electric (GE) DW-68 selenium cell exposure meter circa 1950. It is essentially a 2D incident meter with a hood.
This particular meter still works and is (mostly) accurate.
GE DW-68
GE DW-68
GE DW-68
GE Exposure Meter DW-68
I had one of these – and used it for years! A bit clunky compared to a Weston perhaps, but a lot less money!