Barograph Bourdon New and Updated Other Scientific Instruments Scientific Thermometer
VERY SCARCE BOURDON TUBE BAROTHERMOGRAPH BY NEGRETTI & ZAMBRA No 4311 c1910
Aircraft Barometer Military New and Updated Scientific Technology
WW2 PORTABLE ALTIMETER CALIBRATOR BY MUNRO No 295 c1940
Archive Scientific Technology
PRECISION ANEROID MINING BAROMETER BY NEGRETTI & ZAMBRA No P/111671 c1950
