Art Deco 18 Kt White Gold Bar Pin Brooch 2.8g

Lovely art deco bar pin/brooch in 18 carat white gold. Beautiful etched design with a center hexagon medallion that likely originally had a stone in it. Closure is a trombone clasp. Stamped 18K and a maker's mark, which I can't make out. Measures approximately 2.26" long and weighs 2.8 grams. In excellent condition.