Gauge, Vacuum

Brass gauge with glass face and a valve attachment. There are numbers around the outside edge of the face of the gauge from 0-30 in increments of 5, as well as a movable arrow in the middle that ends in a crescent shape. The manufacturers information is on the face of the gauge, "ELLICOTT MACHINE CORPORATION BALTIMORE, MD. CONDENSER VACUUM VACUUM THE ASHCROFT MFG. CO. NEW YORK REG US PAT OFF". There is a small pipe coming off of the bottom, that has a valve on it. There are three small holes on the bottom edge of the metal body.