Brower Mfg Co of Quincy Ill. made this "USA Brower´s 3in1 Egg grader" The company claimed that it had the "World´s largest line of poultry supplies" This is a dual purpose scale for weighing both chicken and turkey eggs. The aluminum arc is marked 18 to 42 oz per dozen and 1,5 to 2,5 ounces each. An adjustable stop allows the scale to be set for a maximum weight to speed up weighing. It is marked for small, medium, large, and extra large turkey eggs.