A Machine Age Platinum, Diamond and Sapphire Ring, J.& L. Hartzberg, containing four transitional cut diamonds weighing approximately 0.53 carat total, three square step cut diamonds weighing approximately 0.20 carat total and 11 square step and calibre cut sapphires. Stamp: PLATINUM (maker's mark for J. & L. Hartzberg). 4.00 dwts. Estimate 500-700 The ring is an approximate size 4 3/4 on the mandrel.