Object is a panel bearing eight rectangular display areas. Each display contains an array of up to 36 tiny bulbs in 4 groups of 9; not all positions are populated. Each display is fronted by a block of plastic with holes drilled for the bulbs and a translucent front cover with legends for the indicators. Some legends include "SNAT" "PA" "QA" and "LBMA". Two of the plastic blocks are missing.