Alan Adler was one of the few modernist silversmiths who sold only through his own shops. He was awarded a "Living Treasure" designation from the California legislature. This hammered hand made brooch consists of 4 unequal loops. 3 1/2" by 3 5/8", with a sturdy safety clasp. Lightweight at 20 grams, .70 ounce. Marked Adler Sterling. Excellent vintage condition. Adler has a 2 page spread in Schon's Modernist Jewelry 1930-1960, pages 218 and 219.