Window assembly for a vehicle

A window assembly for mounting in a four-sided window opening in a vehicular housing, said assembly comprising a rigidifying frame, first and second glass end panels, a glass center panel, said frame including an upper horizontal member and a spaced lower horizontal member interconnected by a pair of vertical members, said vertical members being spaced apart and inset from the ends of said upper and lower horizontal frame members, each vertical frame member and said upper and lower horizontal frame members forming a C-shaped frame part open at corresponding ends of said upper and lower horizontal frame members, a said glass end panel carried by each C-shaped frame part, each glass end panel extending between said upper and lower horizontal frame members and from a said vertical frame member to corresponding ends of said horizontal frame members, each horizontal frame member including guide means, said glass center panel fitting between said horizontal frame members within said guide means thereof, said guide means for accommodating lateral movement of said glass center panel along said horizontal frame members between a closed position overlying the space between said vertical frame members and an opened position exposing said space between the vertical frame members, said horizontal frame members and glass end panels including cooperating exterior edges having an outline complemental to said window opening and forming the continuous peripheral edge of said assembly.