Six hand-colored etched panels, the last of which serves as the background view, depicting—as the title suggests—a three-dimensional view of a seaport. The foreground consists of the pier, which is framed by buildings and shows people circulating; further on are large sailing vessels on both sides and taking up the entire background scene, while people are ferried between them in wooden dinghies. Two small cutout panels affixed to the inside of the first bellows come together in the oval view hole to provide a closure. The printed monogram on the manuscript slipcase label indicates the creator of this peepshow is Johann Martin Bestelmeier of Nuremberg. Rare: not listed in Hyde's catalogue of the Gestetner Collection, and unknown in any institutional holding. Small paper repair to lower section of first bellows, some marginal soiling, minor rubbing to coated pink paper on upper board. Overall very good or better in a vibrant paste-paper sleeve with title label. 5 3/4 x 5 in.