Davidson Pneumothorax Apparatus made by J. The equipment is built into the wooden case (case in very good, solid condition with some scratches, marks) and is designed to be used vertically. There is a metal handle on the top of the case for ease in transportation.I understand this device was used in the treatment of a collapsed lung. Case measures 18 3/4" tall by 8 3/4" wide by 4 deep. The Pneumothorax Apparatus weighs about 13.6 pounds NOT FOR USE. The item "ANTIQUE DAVIDSON PNEUMOTHORAX APPARATUS MEDICAL SCIENTIFIC EQUIPMENT PAT. 1933" is in sale since Friday, October 18, 2019. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Scientific Instruments\Other Vintage Science Equip". The seller is "metrolinaestatesales" and is located in Charlotte, North Carolina. This item can be shipped to United States.