Pure Silver Proof Coin Set. Struck in one half troy ounce of pure silver with vibrant full color and a low mintage limit! The item “Canada 2016 Star Trek 50th 4 Coin Crew Members $10 Silver Proof Set Kirk Spock” is in sale since Wednesday, April 05, 2017. This item is in the category “Coins & Paper Money\Coins\ Canada\Commemorative”. The seller is “lucky_me555″ and is located in York, Ontario. This item can be shipped to Canada, all countries in Europe, United States, Australia, Japan.