This is a Stuart Turner Compressor or Vacuum pump Factory Built. This is a twin cylinder with a Cast Iron factory base and serial number as shown in pictures. The Brass tank is a water separator so that it does not get into the air compressor or the equipment supplied with compressed air. This unit is very rare to find as factory built, it used to powered using a Stuart Sirius that is also listed as a separate item in another listing. This unit dates to the 1940′s. The item “Live Steam Engine Stuart Compressor or Vacuum pump Factory Built Hit Miss” is in sale since Friday, September 18, 2020. This item is in the category “Toys & Hobbies\Vintage & Antique Toys\Tin\Other Vintage Tin Toys”. The seller is “toypizza” and is located in Barnard, Vermont. This item can be shipped to United States.