Antique Art Nouveau Celtic Revival Champleve Enamel Trombone Clasp Brooch Pin 1.

For your consideration is a beautiful, highly collectible piece of European jewelry history: an authentic antique Art Nouveau / Celtic Revival openwork champlevé enamel disc brooch (circa 1890–1910). This exquisite medallion highlights the exceptional metalcraft of the turn-of-the-century revival periods. The front showcases a symmetrical, openwork web of stylized Celtic knots, scroll work, and trifolium motifs filled with vibrant, hand-applied champlevé enameling in historic shades of deep terra-cotta red, mustard yellow, and caramel tan. Historic Hardware & Provenance: The reverse features a heavy, dark-patinated metal backing with a highly desirable, authentic antique tube hinge and a pull-out trombone safety clasp. This specialized locking hardware strongly indicates the piece is a historic European import, most likely originating from a high-quality French or Austro-Hungarian artisan workshop of the period. Specifications: •	Period: Art Nouveau / Belle Époque (Late 19th / Early 20th Century) •	Technique: Champlevé Enamel & Openwork Cutouts •	Clasp Type: Authentic Pull-Tubular Trombone Clasp & Tube Hinge •	Dimensions: Measures exactly 1.5 inches (38mm) in diameter. Condition: Excellent antique condition. The complex champlevé enamel work is exceptionally preserved, retaining its high gloss and vivid coloration with no major chips, deep pits, or missing segments. The metal base has developed a magnificent, dark historic tarnish patina that beautifully showcases its age. Th