Common use of COMMON CODES; ISINS Clause in Contracts

COMMON CODES; ISINS. The Company has caused Common Codes and ISINs numbers to be printed on the Notes and the Trustee may use the Common Codes and ISINs numbers in notices of redemption as a convenience to Holders. No representation is made as to the accuracy of such numbers either as printed on the Notes or as contained in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon. The Company will furnish to any Holder upon written request and without charge a copy of the Indenture. Requests may be made to: CGG Holding (U.S.) Inc. ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ of America Attention: ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ +▇▇ ▇ ▇▇ ▇▇ ▇▇ ▇▇ Matthieu Lugez +▇▇ ▇ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇▇▇▇▇▇▇▇▇▇@▇▇▇.▇▇▇ ASSIGNMENT FORM To assign this Note, fill in the form below: (I) or (we) assign and transfer this Note to and irrevocably appoint to transfer this Note on the books of the Company. The agent may substitute another to act for him. Date:

COMMON CODES; ISINS. The Company has caused Common Codes and ISINs numbers to be printed on the Notes and the Trustee may use the Common Codes and ISINs numbers in notices of redemption as a convenience to Holders. No representation is made as to the accuracy of such numbers either as printed on the Notes or as contained in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon. The Company will furnish to any Holder upon written request and without charge a copy of the Indenture. Requests may be made to: CGG Holding (U.S.) Inc. ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇Houston, ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ TX 77072 United States of America Attention: ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ +▇▇ ▇ ▇▇ ▇▇ ▇▇ ▇▇ Matthieu Lugez ▇▇▇▇▇▇▇▇ ▇▇▇▇▇ +▇▇ ▇ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇▇▇▇▇▇▇▇▇▇@▇▇▇.▇▇▇ ASSIGNMENT FORM To assign this Note, fill in the form below: (I) or (we) assign and transfer this Note to and irrevocably appoint to transfer this Note on the books of the Company. The agent may substitute another to act for him. Date:

COMMON CODES; ISINS. The Company has caused Common Codes and ISINs numbers to be printed on the Notes and the Trustee may use the Common Codes and ISINs numbers in notices of redemption as a convenience to Holders. No representation is made as to the accuracy of such numbers either as printed on the Notes or as contained in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon. The Company will furnish to any Holder upon written request and without charge a copy of the Indenture. Requests may be made to: CGG Holding (U.S.) Inc. ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ of America Attention: ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ +▇▇ ▇ ▇▇ ▇▇ ▇▇ ▇▇ Matthieu Lugez +▇▇ ▇ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇▇▇▇▇▇▇▇▇▇@▇▇▇.▇▇▇ ASSIGNMENT FORM To assign this Note, fill in the form below: (I) or (we) assign and transfer this Note to and irrevocably appoint to transfer this Note on the books of the Company. The agent may substitute another to act for him. Date: