In the chess game between Coyle and Le Blanc, Coyle is obviously playing the black pieces. However, he moves a white piece on the board and removes a black piece.
While studying the mysterious chicken toy, Artie says that he had tried enlarging it under the Balopticon. In some ways similar to the magic lantern, the Balopticon was an electric predecessor of the overhead projector build by the optical company Bausch & Lomb, and first introduced in 1911.
Though the series takes place in the 1870s, Jim West is seen viewing a Mutoscope machine, which was an early form of moving picture format. Mutoscopes weren't introduced until the mid 1890s.