Cook Islands 2017 Giant Windows of Heaven – Berlin Cathedral 3×3 oz Silver Coins. 280 gram of pure silver in proof quality. Coins with painted glass. Very low mintage – limited to only 999 pieces. We strive for excellent service. Though we normally reply to inquiries as soon as possible, please note that our office is limited on weekends and holidays. Auctiva Offers Free Image Hosting and Editing. Auctiva gets you noticed! Track Page Views With. Auctiva’s FREE Counter. The item “Cook Islands 2017 Giant Windows of Heaven Berlin Cathedral 3×3 oz Silver Coins” is in sale since Thursday, November 23, 2017. This item is in the category “Coins & Paper Money\Coins\ World\Europe\Other European Coins”. The seller is “jvpic” and is located in Berlin. This item can be shipped worldwide.