Genuine Casascius 0.5 BTC Physical Bitcoin. Direct from the manufacturer Casascius. Supplied complete with a clear, hard plastic re-seal coin capsule. Buy with total confidence. HardBTC. ‘Preferred supplier of Casascius Coins’. Worldwide Free Delivery Ships from United Kingdom &USA Coin details: Value: 0.5 BTC.Year: 2013 Diameter: 25.4 mm (1.000 inch). Weight: 5.5 g. About HardBTCHardBTC Ltd. has the privilege of being the UK’s ‘Preferred supplier be found on the coin makers, www.Casascius.com website. HardBTC now has a US shipping agent, for all customers based in the United States of America. HardBTC is dedicated to providing a reliable, reputable and efficient outlet for Casascius coins and have been market leaders right from the start. With our new outlet in the US HardBTC is now able to ship any orders for the USA directly from the USA, we will of course carry on normal UK shipping dispatching from the UK where applicable. Know whom you are dealing with: HardBTC is a UK registered limited company and listed in Companies House, the UK’s official registry of companies. HardBTC Ltd. UK Registered Company, company number 8313346 You can verify the company registration using the link below http://wck2.companieshouse.gov.uk//wcframe?name=accessCompanyInfo Shipping Of Coins For security reasons Casascius coins are shipped from the makers in an ‘un-funded state’, funding of the coins occurs after Casascius is informed that they arrived safely. This funding process is all done electronically and all the coins we retail are in mint condition, untampered, genuine Casascius coins. Please be assured that this is no way effects the value of your coin.Shipping HardBTC ships from the UK & USA. All orders (subject to stock availability) from the United States of America will be shipped from our agent in the United States. . Free express delivery to all zones covered by Royal Mail & USPS Airmail services. Mainland UK (Shipped from UK) Royal Mail Special Delivery £ FREE Next working day before 13:00 USA (Shipped from USA) USPS Priority Mail £ FREE https://www.usps.com/send/priority-mail.htm Europe & World Wide (Shipped from UK) Royal Mail Airsure or £ FREE Internationally signed for http://www.royalmail.com/personal/international-delivery/airsure http://www.royalmail.com/personal/international/international-signed-for About the coins The coin has a peel back tamper proof hologram sticker, which reveals a ‘Private key’, which is redeemable at the major bit coin dealer MtGox.com. Here you can convert these physical Casascius Bitcoins into normal digital Bitcoins. Using the “Redeem Private Key” feature under the Funding Options menu. How Do They Work, and how can I be sure the coin has any value ? : Casascius coins use the “minikey“ private key format. ( https://en.bitcoin.it/wiki/Mini_private_key_format ) This “private key” is on a card embedded inside the coin, which is protected by a tamper-evident hologram (the attractive shiny side of the coin). The tamper-evident hologram leaves behind a honeycomb pattern if it is peeled. If the hologram is intact, the bitcoin is ‘good’. An 8-character code is visible on the hologram & this is the first eight characters of the Bitcoin address assigned specifically to the coin. You can verify the coin’s balance by typing this code into the search box (scroll down the page to find it) on http://blockchain.info/ There is a mathematical relationship between the Bitcoin address and the private key inside the coin. The digital bitcoin is actually located on the public “block chain” stored on the Internet, but it is completely inaccessible to anyone unless the private key from the coin is loaded into a Bitcoin wallet. For instance one of the coins (I will be listing the other coin’s codes shortly) for sale has the following code visible, 1CcSiC98, go to http://blockchain.info/ and type in the code to check the coin’s balance. A note on redeeming the coin at MTGOX.com. You’ll need to go into your MtGox.com account, go ‘Funding Options’, ‘Add Funds’, ‘Redeem Private Key’. Enter the 30-character code that you revealed underneath the hologram, ignore the 8 characters on the front of the coin. Put any message you like in the description. If the codes are typed correctly (case sensitive, type them as you see them, upper and lower case) you should get a message saying the code’s been accepted. It will not show on your account for 1-2 hours. If you’ve put the code in incorrectly you’ll get a message to that effect. It takes a while to update, it looks like nothing is happening for at least an hour (or more), then as if by magic your account will update with the BTC funded to the coin. Hope this helps.