999 Fine Silver Proof. Mintage: Only 1,000 Pieces WORLDWIDE. 2015 Cook Island 10 dollar Nano Life. Proof coin, 50 grams. With built in Nano Life chip. Original Box and “Certificate of Authenticity” included. Mintage: 1,000 Pieces WORLDWIDE. The Nano Chip of the latest generation provides an insight into the evolution of life on our planet. Under the microscope one finds informative details and illustrations of Evolution across the last 542 million years. Beginning in Ancient Times (Paleozoic), on to the Middle Ages (Mesozoic), and right up to Contemporary Time (Cenozoic), illustrations simple arthropods through to Homo erectus are shown as steps of evolution. Who knows whether the human race will also simply be referred to as an intermediate stage of Evolution in an indefinite period of time. Weight: 50 g (1.61oz). Dimension: 50.00 mm. Quality: PROOF N COLORED. It’s in excellent condition with box and certificate.