George Mallory made a couple of attempts on Everest (1921, 1922) before that fateful day in 1924 when he disappeared along with Sandy Irvine. On display at the National Mountaineering Exhibition in Rheged until 2004, the ice axe Mallory used during the 1922 expedition is now up for auction at Christie's. Expected to fetch a price of between $11,000-$13,000, this amazing piece of mountaineering history will go to the highest bidder on April 10th.