EBay Live Lot of 100 1 gram Istanbul Gold Refinery (IGR) Bar. 9999 Fine In January 15, 2024 / By admin / In ebay This is the newest assay in the IGR collection. Obverse: Depicts the IGR logo inside an oval, and features the weight, purity, and Istanbul Gold Refinery stamp. Reverse: Features a diagonal fashioned and repeating IGR stamp.