A Rare Large 1977 Zanders Calendar with 3D Images, inc Compass Camera etc. A2 size (18 1/2 x 25 1/2 inches) published by the Robert Horne Paper Company. Eight of the months feature a full-size, fold out '3D' image and include an impressive shot of a Compass camera and another of a page of Ambrotypes. First images dog-eared at bottom, but still folds out with care. Very difficult to show the resulting folded-out images, see here for a short video of the folded-out Compass camera image https://tinyurl.com/4wm3z28f