Mail box signal

In a mail box or similar container which is opened at one end, said box having a door hinged along one edge of said open end for closing said opening, the improvement comprising a self canceling signal positioned on a side wall of said mail box near said open end, said signal having a crankshaft which extends through an opening in said side wall to the exterior of and to the interior of said mail box and to each end of the crankshaft is a crank arm, each arm being perpendicular to said crankshaft and in an offset direction to the other crank arm, said crank arm on the interior of said box extending from said crankshaft through the plane of said door when in the closed position, said arm on the exterior of said box having at it's end opposite said crankshaft a combination weight and position indicator.