Vintage spring loaded mail slot that opens inward at 45 degrees to allow mail through. Made of brass with a patina finish. The original mounting screws are not available. Good condition with surface wear from prior use. One available. The manufacturer and exact date of creation are unknown. The dimensions are Front 6 in. L x 2.375 in. W x 0.5 in. D, opening 4.25 in. L x 1.062 in. W, back 6 in. L x 2.375 in. W x 0.125 in. D, opening 4.25 in. L x 1.125 in. W.