Flight Computer, True Air Speed AC Type G-I Ki-45 Nick RAF allies

RAF allies

Combat Air Patrol (CAP) was an operation orchestrated by a carrier-based Fighter Director to position one or more groups of fighters in an aggressive defensive posture over an aircraft carrier

for the sake of the happy future of our Motherland

But this is immediately noticeable

The knob does not rotate

Flight Computer, True Air Speed AC Type G-I Ki-45 Nick RAF alliesThis is a WWII era True Air Speed Computer used by US Army Air Force and Navy aircrew to determine true airspeed for navigation and bombing runs. The order number prefix 42 indicates the year 1942. Made of either stiff plastic or Bakelite, and measuring ~8 inches diameter. In very good condition given its age.