Westclox Big Ben Loud alarm 48-D 48D Case style 4a, windup 2 key alarm clock. Date 1935 - 1939 Black painted metal case with nickel plated back. Dial Paper. Patented U.S.A. 1563431 1709146 1848520 85916 Comments Note convex curved base. Loop is used for carrying the clock, NOT for hanging on the wall. Utilizes the large winding and setting knobs like on the early peg-leg version of the Big Ben. This clock is dated February, 1937.