Flight Computer, True Air Speed AC Type G-F OH-6 Cayuse The liquid is no longer

The liquid is no longer contained in the body

This is a crash relic believed to be from a WWII Soviet Air Force Yakovlev Yak 7 recovered from its crash site in Poland

but we have no way to authenticate the document

25 inches diameter and ~3 inches long

including bombers B-17

Flight Computer, True Air Speed AC Type G-F OH-6 Cayuse The liquid is no longerThis 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 and measuring ~8 inches diameter. In good condition given its age.