Here are some pics that could be off reference use, posted before in the Armor forum:
Elevation scale in polished steal, red dials, elevation control handles in wood with brass fairing.
Breach, sliding rail and elevation scale, polished steel.
Loading bay, brass fairing, please also note 360' scale in poished steel, red dials.
All pictures where taken at the Imperial War Museum in London, November 2005.
VBR
Johan