A rare airship aneroid non recording barometer/barograph, unsigned, the base with maker's monogram UR7 No.4359, the rotating cover with correction table engraved on the circumference with a scale 0-10, the side with thermometer and ivorine scale with magnifier reading 500-800 in original plush lined fitted case with explanation leaflet, the catch inscribed 'LZ Paris'. Instrument dia. -- 3 1/8in (8 cm)