The unit is in good shape and has little to no wear. This unit is rated up to 6000 feet. The leather case is in great shape and the snap for the lid works perfect. The item “American Paulin System Micro Altimeter M1-6 6000 Feet Surveying Instrument” is in sale since Friday, January 08, 2016. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “celtic_cabin” and is located in Triadelphia, West Virginia. This item can be shipped to United States.