I've seen both tempered and safety. Most of the early B&W safety glass was not tempered, but was 2-ply safety glass like an old car windshield. But some of the color flat glass, and the convex safety glass used on non-bonded 60s color sets (Sears, Packard-Bell) with 21FBP22 was tempered. It just about explodes if you bang it on the edge
Charles