20396. Agatha van Erp Student Hammered Copper & Brass Vase c1930s. Agatha taught metal working classes at Metalcraft in San Francisco during the 1930s. Agatha’s student work from the 1930s-1950s tend to be of superior quality, as she would re-hammer the student’s work just before each exhibition. Unsigned. Excellent new patina. 5.25″h x 3.5″d $950