AS FOUND A WW11 U.S.NAVY AIRCRAFT INSTRUMENT OFF THE PANAL OF A P40...AFTER RESEARCHING THE INSTRUMENT IT POINTS TO A P-40 AIRCRAFT....THE PART NUMBER AND OTHER NUMBERS ARE ON BRASS PLATE ON THE BACK OF THE INSTRUMENT....IF IT IS NOT A P-40 IT IS ANOTHER CURTIS BUILT WW11 AIRCRAFT..GREAT PIECE OF WW11 ...THANKS FOR LOOKING