

Aviation Barometer New and Updated Pocket
VERY RARE EARLY AIRCRAFT ALTIMETER MKI BY ELLIOTT BROTHERS c1912


Aircraft Barometer Military New and Updated Scientific Technology
WW2 PORTABLE ALTIMETER CALIBRATOR BY MUNRO No 295 c1940



Aircraft Aviation Barometer New and Updated
RARE WWI WRIST HYPSOMETER OR AIR ALTIMETER BY STEWARD No 5037 c1915

