Object is a large sheet of 3/8-in aluminum with many holes, some occupied by plug wires. Front is silk-screened with red, green, white and yellow colors dividing the plug holes into blocks of various shapes. Legends down left and right designate the blocks as, e.g., "AMPLIFIERS", "ATTENUATORS", "SERVO MULTIPLIERS" etc. (suggesting this panel is related to analog functions). No maker or machine type labels evident.