Rotate the copper base to watch the planets and galaxies pass by the porthole of the astronaut’s spaceship! This bimetallic behemoth combines pure silver, pure copper, and multiple innovative technologies like ultra high relief with a minuscule mintage limit of just 250 to create an out of this world experience! This rotating bimetal coin will make your head spin! It’s huge, a massive 3 inches across and more than 12 ounces in weight! Multiple technologies including ultra high relief create a whole greater than the sum of its parts, with the galaxies and planets of deep-space whirling by in their vivid glory, with both antiqued pure silver and pure copper creating a universe expanding, out of this world experience! Here’s what you need to know… This Coin Is HUGE… It measures a full 75 mm (three inches) across. And it’s HEAVY. Composed of 15 grams of pure silver and 340 grams of pure copper, it weighs in at over 12 full ounces. That’s right, it’s a true bi-metal coin, not one of those plated pretenders. Make The Universe Spin On Its Axis! Just rotate the copper base and see what the astronaut sees! The planets, galaxies, nebulae and interstellar space all spin by the spaceship’s porthole. But don’t worry, you can stay safe and sound here on planet Earth, so there’s no chance of getting spacesick! The Design Is Outstanding! You get not just one but two separate outer space scenes. On one side, the astronaut inside his spaceship looks out the window onto the rotating vastness of space. On the other side, he’s outside in his spacesuit taking in the majesty of the planets. And BOTH sides sport full color, ultra high relief, AND an antiqued finish, giving you outstanding views of the universe, as befits a premium medallic coin called Cosmic Encounters! Rotate the copper base to join our astronaut in watching the planets and galaxies pass by the porthole of his spaceship! This true bimetal behemoth combines pure silver, pure copper, and multiple innovative technologies with a minuscule mintage limit of just 250 to create an investment grade keeper! Packaging The coin is housed inside a black presentation case with full color illustrated lid, lined with black velvet and protected by a white cardboard sleeve. A full color, oversize, individually-numbered certificate of authenticity is included. The coin is not encapsulated, as it is rotating and interactive. The image of the back side of the certificate is a mint-supplied image intended for general reference only. Serial number on image is NOT indicative of the serial number you will receive! 355 g: 15 g pure silver 340 g pure copper. Antiqued with Digital Color Technology. 999 Fine (Pure) Silver and. 999 Fine (Pure) Copper.