This model 7 barometer. A.B was made by the prestigious manufacturer Jaeger (who would later become Jaeger Lecoultre) in the 1960s. It can be calibrated using a wheel that is turned up to the altitude of the place. It also has a thermometer function. The base and the back of the barometer is made of black bakelite.. The inscriptions are made on the inside, which limits the wear and erasure of them over time. This pretty instrument is in working condition and gives a measurements of atmospheric pressure.