Autopilot Turn Controller for A-5 Auto Pilot System, Sperry ME-109 This is a fine example

This is a fine example of a Cold War-era Mach Speed Indicator Mk 3A Ref 6A/3300

400 cycles

likely when they were removed from the aircraft

and the PBY5A Catalina Seaplane (which used 2)

Autopilot Turn Controller for A-5 Auto Pilot System, Sperry ME-109 This is a fine exampleThe A 5 Automatic Pilot was used primarily in WWII era bomber aircraft of the Air Corps US Army such as the Consolidated B 24 Liberator (see photo of B 24 cockpit showing the location of the A 5 panel). The A 5 system appeared in aircraft manufactured during or before 1943, the year when the Honeywell C 1 system became the standard autopilot system for large multi engine aircraft. Theoretically, the A 5 system may also have appeared in the Boeing B 17