Vintage Green Onyx Fountain Pen Desk Holder Marbled Swivel Stand Art Deco Era For Sale

Vintage green onyx fountain pen desk holder/stand, featuring a polished rectangular stone base, adjustable brass-tone ball-and-socket mount, and a decorative amber/brown marbled early-plastic holder with flared black pen receptacle. Based on the materials and construction, this piece likely dates to approximately the 1930s–1940s and has a classic Art Deco-era executive desk appearance. Unmarked; maker unknown. Pen not included.
Base Measurements (Approx.): 2\" x 3\" x 7/8\"Fair to good vintage condition with age-related wear. The stone base has visible chips/edge losses, surface scratches and marks, while the metal components show patina and finish wear. The underside has substantial deterioration/loss of the original felt or fabric covering. Please review all photos closely for exact condition and details.