This sale is for a vintage adjustable device with a paper tag that is marked "US ARMY".  It also has a metal tag that is marked "MODEL NO.3000 SERIAL NO.170  GAMMA INSTRUMENTS CO. NEW YORK".  This device has 2 small dials on the top that adjust the arm at the top to allow it to move in 2 directions.  The larger dial allows this item to adjust to a height of 8 inches as shown in the first 2 pictures.  This piece weighs over 7 pounds.  The base measures 3 1/2 inches in width, 6 inches in length and 3/4 of an inch in thickness.  This item is in good condition and is being sold as is for display or restoration.  Study the pictures carefully as there are no returns. This seller does not ship internationally.