Rare Vintage 1940s Unsigned Eisenberg Style Pot Metal Bow Brooch - Pink & Aqua Book Piece

Collecting Costume Jewelry 202: The Basics of Dating Jewelry by Julia C. Carroll * Why it's essential: A staple for identifying "book pieces," this guide offers meticulous visual breakdowns of 1940s unbranded construction styles, focusing heavily on how to attribute unsigned works through stone-setting styles, solder lines, and heavy-gauge open metalwork. A highly coveted WWII-era "book piece" documented in Eisenberg Originals: The Golden Years by Sharon G. Schwartz (Page 32, Fig. 2.7). This massive, three-dimensional statement pin is a masterclass in mid-century costume artistry, crafted from heavy cast pot metal with a beautifully aged, authentic dark patina. It features a spectacular, high-contrast color palette of vibrant fuchsia pink and ice-aqua blue crystals. The design masterfully pairs large, geometric emerald-cut stones and a central oval crystal in premium, unfoiled open-backed settings—designed to mimic fine jewelry by letting light flow directly through the glass—alongside foil-backed round accent rhinestones securely cradled in closed-back cups. It is structurally pristine with a long, robust pin stem and a fully functional safety C-clasp, perfectly engineered to anchor heavy winter coats, blazers, or lapels. An exceptional, collector-grade find for the advanced vintage