Vintage Forstner stretch bracelet. It is marked 1/20. 12kt. GF (for gold filled). Relaxed it is 6 1/2” in diameter but stretches comfortably to 8”. This is a great piece of vintage jewelry is from a corporation that began as the Forstner Chain Corporation in 1920 starting out making ornamental jewelry and watch bracelets. No twists or damages. Thank you for shopping my closet.