He patented several designs during the 1930s and early 1940s, In addition to costume jewelry, Pomerantz also produced unusual metal belts, large, showy buckles made from a variety of materials, including bakelite! Pomerantz is also well known for making buttons, including women's cuff buttons.
Much confusion has risen from the fact that Herman Pomerantz made a great deal of very large Victorian Revival jewelry circa 1930-40, heavy jewelry with open backed unusual stones and fancy metal textures that do look much like 19th century jewelry, even to experts. Pomerantz jewelry with textured backs and AB rhinestones were made circa 1960.
There are at least 4 signatures: "H. Pomerantz & Co. N.Y.," "H. Pomerantz Inc. N.Y.," "H. Pomerantz Co." and just "H. Pomerantz." Some try to date the jewelry by the signatures, but there seems to be no rhyme or reason to them.