This unique shot probably from 1963 (Jan 7 1963 is a Monday, assuming the wall calendar is correct) shows the operator's desk of BESK. Note the "screen" - showing three 40-bit words (5 octal digits = 40 bits). The actual processing unit (=the computer) is behind the operator and occupies a wall...

The picture is scanned from a 4x4 Agfacolor positive.