Unger Brothers American Art Nouveau Buckle/Brooch. This is an early 20th Century American Art Nouveau belt buckle/brooch made by Unger Brothers of Newark, NJ (1872-1910/1919). This sterling silver buckle/brooch measures 1.625 inches high and .2.375inches wide. The buckle/brooch bears impressed marks for Unger Brothers, Sterling, 925. This brooch is in excellent condition.