Replacement Windshield Question

should be a safeguard made glass from McGraw Glass plant in Detroit Michigan that was sandblasted in using a stencil before going through the furnace (worked there from 66 to 2003) M code and probable the 61 0r 62 series (clear or tint.) laminated glass. in the 70's there wasn't a date code just a plant/shift Dot pattern (80's it started being dated,shift and line)