This is an antique pocket barometer altimeter, thermometer and compass weather station used by explorers and travelers from late 1800s until early 1900s. The signature of well known family of scientific instruments makers L & A Boulade Freres from Lyon present on the barometer face together with the name of local retailer (J Games Opticien Lyon). The three separate instruments are functional: the barometer scale goes from 44-80 torr or mm/mercury and the high altitude altimeter scale ranges from 0 to 4000 meters adjusted by the rotating bezel. The circular thermometer shows the temperature in Reaumur and Centigrade degrees and goes from -10R to 40R and -10C to 50C. The wonderful compass has a nice locking knob situated on the side of the case, blue still needle, a red jewel stone silvered brass face with French cardinals. The barometer has unusual small aneroid mechanism. The device is made of nickel covered brass with minimal wear and tear due to the age. Some dust entrapped in the compass and thermometer case. Dimensions: 53mm diameter and 20mm height.