Boresight Telescope Mark VIII Mod 6 BOAC According to the RAAF 346

According to the RAAF 346 Types and Locations of Instruments in RAAF dated 1945

The AAU 19A/A altimeter is a standard 3 inch counter-drum-pointer altimeter which provides two modes of operation -- servoed (reset) mode and standby mode

The instrument looks terrific and would make a wonderful display piece

see photo of cockpit with one of these selectors appearing in front of the pilot and one in front of the co-pilot

using a 10

Boresight Telescope Mark VIII Mod 6 BOAC According to the RAAF 346Designed for naval ordnance, this Boresight Telescope, made by Spencer Lens Co., was used to align the bore of a naval gun to its distally mounted gunsight along the specified firing range. The telescope was positioned within the bore of the gun during the sighting procedure, to align the line of firing with the line of the gunsight, intersecting them along the specified firing range. Used for sighting 3" 50 guns. The case measures 12. 5 inches long,