B&W, Ace Pilot Model 1950, perspective view. "DSIR ACE PILOT MODEL 1950 NPL" sign on top of hardware. Tile floor, shiny sheet under hardware in a room with overhead tubular light fixture and large window to the left. Two additional pieces of hardware on carts/rollers toward rear center and left. "273" black pencil on verso left center edge. Strip of black ink, printed paper taped to center verso; "CS745, The ACE Pilot Model at the time of its 'press conference' in Bushy house, NPL. From the left are a Hollerith 80 column card reader/punch for input and output, the control desk with a display and the main frame. The lines are on the tray in the front, long delay lines in the wooden box underneath. The metal sheets were found to reduce pickup of extra pulses from electrical noise.".