Fantastic Engine Order Indicator. Older one, before Bureau of Ships became “Navships” or Navsea. Has 1 or 2 backlights inside. 16.5 lbs 9 1/4” x 7” x 7 1/4 deep. Gorgeous mirror-like finish on aluminum front plate & polished brass knob. Body could be repainted with machinery gray, if desired. Fitting on bottom could be removed and wires clipped off, if desired.