Denomination: 1 BTC
Diameter: 28.5 mm
Thickness: 1.5 mm
Weight: 6.8 g
Best Grade: MS-69
This coin is identical to the 2011 version, except the year ‘2012’ is displayed on the front.
A significant number (nearly a fourth) of these coins have been redeemed, most likely as a direct result of the dramatic rise in bitcoin value in late 2013.
*The numbers refer to series 2 1 BTC coins funded in 2012. This number may possibly contain a small number of coins marked ‘2011’ .
In August 2013 at DEF CON 21, it was reported that a Casascius coin was successfully compromised. It was done by injecting small amounts of certain chemicals through a small hole in the hologram using a hypodermic needle. This allowed the hologram to be removed and replaced. Reportedly, the hologram of the tampered coin was not as ‘vibrant’ as ontampered ones. There have not been any reports of a compromised coin ‘in the wild’ or being put up for sale.