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<page> Incorporated Under the Laws of the State of California Number Share(s) Specialty Laboratories, Inc. Authorized Capital Stock: 110,000,000 Shares, No Par Value 100,000,000 Shares Common Stock 10,000,000 Shares Preferred Stock These Shares Are Subject to Certain Restrictions Described on the Reverse Hereof This Certifies That ** Specimen ** Is the Registered Holder of Shares Transferable Only on the Books of the Corporation by the Holder Hereof in Person or by Attorney Upon Surrender of This Certificate Properly Endorsed. in Withness Whereof, the Said Corporation Has Caused This Certificate to Be Signed by Its Duly Authorisded Officers and Its Corporate Seal to Be Hereunto Affixed This Day of A.D. [Seal] - Deborah A. Estes Secretary Paul F. Beyer President <page> for Value Received Hereby Sell, Asign and Transfer Unto Please Insert Social Security or Other Identifying Number of Assignee (Name and Address of Transferee Should Be Printed or Typewritten) Shares Represented by the Within Certificate And, if Required, Do Hereby Irrevocably Constitute and Appoint Attorney to Transfer the Said Shares on the Books of the Within Named Corporation, With Full Power of Substitution in the Premises. Dated in Presence of , Notice: The Signature on This Assignment Must Correspond With the Name as Written Upon the Face of the Certificate in Every Particular Without Alteration or Enlargement, or Any Change Whatever. These Securities Have Not Been Registered Under the Securities Act of 1933, as Amended (The "Act"). They May Not Be Sold, Offered for Sale, Pledged or Hypothecated in the Absence of a Registraiton Statement in Effect With Respect to the Securities Under Such Act or an Opinion of Counsel Satisfactory to the Company That Such Registration Is Not Required or Unless Sold Pursuant to Rule 144 of Such Act
