JOHANNESBURG, South Africa: South Africa on Friday (Saturday in Manila) condemned the planned auction of the key to the prison cell that once held ex-president and national hero Nelson Mandela. The key to the cell on Robben Island, where Mandela was jailed for 27 years, is the headline item of a January 28 auction by British auction house Guernsey's. 'It is unfathomable for Guernsey's, which is clearly aware of the painful history of our country and the symbolism of the key, to consider auctioning the key without any consultation with the South African government, the heritage authorities in South Africa and Robben Island Museum,' Minister of Sports, Arts and Culture Nathi Mthethwa said in a statement. According to media reports, Mandela's former prison guard Christo Brand is the seller of the key.