Historical information

Precision instrument used meteorological offices on air fields to measure barometric pressure

Physical description

141.1 Metal cube shape instrument with button switch attached is a cylindrical read out and adjuster knob.
141.2 Carry box with hinged lid and metal latch, has three hold down screws.
141.3 Stainless steel and glass thermometer
141.4 batteries 4x 15v. Standard batteries were HT Eveready B123 30v x3, LT Eveready LLII 1.5 v x1

Inscriptions & markings

Aneroid Barometer, Type No. M.1991/A Range 800-1050mb. Ser No. 686/65, Mechanism Ltd, Made in England