Vintage Hogan Bolas Abstract Red Enamel Gold Tone Brooch

This signed vintage Hogan-Bolas brooch features a rounded triangular shield silhouette with sweeping sculptural gold-tone curves. A dark brown-black enamel or oxidized background creates strong contrast, while a small red oval accent adds a vivid focal point. The abstract flame-like design gives the piece a bold modernist and architectural character.  The reverse is marked Hogan-BOLAS and fitted with a pin-back closure. The polished back shows numerous fine scratches, age-related surface wear and small areas of darkening. The front also shows minor wear consistent with previous use.  The red accent and dark surface have not been professionally tested and are described as enamel, lacquer or resin based on appearance. The pin mechanism appears intact. Please review all photographs and the accompanying video for the exact condition.