The work is part of the first series conceived by Boris Mikhailov, Superimpositions, also called Butterbrot (Sandwich). This body of works evolved between the late ‘60s and early ‘70s, although - due to the restrictions of the Soviet era - it existed for a long time just in the form of slideshow, and the single images began to be printed not before the end of the 1980s, when he started to live in the West. The series was for the first time published much later, in 2006, in the book Yesterday’s Sandwich. In Yesterday’s Sandwich series, Boris’ criticism is veiled in metaphor and suggestion, relying on an unspoken narrative. A series of 52 images, each is composed of two color slides overlaid to portray a reality that is both fantastic and infinitely suggestive.