An exceptional, highly collectible heavy cast-iron architectural relic from the peak of the American Prohibition era. This is an authentic, one-piece combined front door security peephole unit featuring a built-in heavy mechanical door knocker. The interior side boasts its fully functional, hinged privacy viewer hatch door. Crucially, the casting features the crisp, original raised manufacturing stamps reading: 'THE SPEAKEASY DORIGRIL PATENTED PAT. NO. 1747159'. This officially verifies the mechanical design's registration date to February 1930. Features striking Spanish Revival / Art Deco open fretwork detailing with a beautifully aged, undisturbed dark graphite surface patina. Fully functional moving parts. • Country of Origin: United States / Spain • Year Made: 1930 (Documented) • Estimated Value: €450 • Reserve Price: €348 (Locked)