Southern Copper Corporation Watch

from SC 13D/A 1 page Joint Filing Agreement

from SC 13D/A 1 page Cerro Trading Company, Inc. (“Cerro”) and Spc Investors, LLC (“Spc Investors”) Hereby Agree That the Amendment No. 6 to Schedule 13d to Which This Joint Filing Agreement Is Attached as an Exhibit Is Filed With the Securities and Exchange Commission on Behalf of Each of Cerro and Spc Investors. in Witness Whereof, the Parties Have Signed This Joint Filing Agreement as of the 15th Day of April, 2005. Date: April 15, 2005 Cerro Trading Company, Inc. By: /S/ Robert W. Webb Name: Robert W. Webb Title: Secretary and General Counsel Spc Investors, LLC By: /S/ Thomas J. Pritzker Name: Thomas J. Pritzker, Solely in His Capacity as Trustee and Not in His Individual Capacity Title: Truste By: /S/ Karl J. Breyer Name: Karl J. Breyer, Solely in His Capacity as Trustee and Not in His Individual Capacity Title: Trustee By: /S/ Marshall E. Eisenberg Name: Marshall E. Eisenberg, Solely in His Capacity as Trustee and Not in His Individual Capacity Title: Trustee

from SC 13D/A 1 page Cerro Trading Company, Inc. (“Cerro”) and Spc Investors, LLC (“Spc Investors”) Hereby Agree That the Amendment No. 6 to Schedule 13d to Which This Joint Filing Agreement Is Attached as an Exhibit Is Filed With the Securities and Exchange Commission on Behalf of Each of Cerro and Spc Investors. in Witness Whereof, the Parties Have Signed This Joint Filing Agreement as of the ___ Day of April, 2005. Date: April __, 2005 Cerro Trading Company, Inc. By: /S/ Robert W. Webb Name: Robert W. Webb Title: Secretary and General Counsel Spc Investors, LLC By: /S/ Thomas J. Pritzker Name: Thomas J. Pritzker, Solely in His Capacity as Trustee and Not in His Individual Capacity Title: Trustee By: /S/ Karl J. Breyer Name: Karl J. Breyer, Solely in His Capacity as Trustee and Not in His Individual Capacity Title: Trustee By: /S/ Marshall E. Eisenberg Name: Marshall E. Eisenberg, Solely in His Capacity as Trustee and Not in His Individual Capacity Title: Trustee

from 8-K 53 pages Agreement and Plan of Merger Dated as of October 21, 2004 by and Among Southern Peru Copper Corporation, Spcc Merger Sub, Inc. and Americas Sales Company, Inc., Americas Mining Corporation, Minera México S.A. De C.V

from SC 13D 1 page Joint Filing Agreement