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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001181431-05-047407.txt : 20050817
<SEC-HEADER>0001181431-05-047407.hdr.sgml : 20050817
<ACCEPTANCE-DATETIME>20050817101546
ACCESSION NUMBER:		0001181431-05-047407
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	19980416
FILED AS OF DATE:		20050817
DATE AS OF CHANGE:		20050817

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OYO GEOSPACE CORP
		CENTRAL INDEX KEY:			0001001115
		STANDARD INDUSTRIAL CLASSIFICATION:	MEASURING & CONTROLLING DEVICES, NEC [3829]
		IRS NUMBER:				760447780
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		7007 PINEMONT DR.
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77040
		BUSINESS PHONE:		7139864444

	MAIL ADDRESS:	
		STREET 1:		7007 PINEMONT DR.
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77040

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			OYO CORP USA
		CENTRAL INDEX KEY:			0001049649

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	333-36727
		FILM NUMBER:		051032270

	BUSINESS ADDRESS:	
		STREET 1:		7334 N GESSNER ROAD
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77040
		BUSINESS PHONE:		7139399700

	MAIL ADDRESS:	
		STREET 1:		7334 N GESSNER ROAD
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77040
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>rrd89381.xml
<DESCRIPTION>ADDING HALL OPTION INFORMATION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>1998-04-16</periodOfReport>

    <dateOfOriginalSubmission>2005-08-12</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001001115</issuerCik>
        <issuerName>OYO GEOSPACE CORP</issuerName>
        <issuerTradingSymbol>OYOG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001049649</rptOwnerCik>
            <rptOwnerName>OYO CORP USA</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>245 N. CARMELO AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 101</rptOwnerStreet2>
            <rptOwnerCity>PASADENA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>91107</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Options (obligation to sell)</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>14.00</value>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>1998-04-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>160000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2001-04-17</value>
            </exerciseDate>
            <expirationDate>
                <value>2008-04-15</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>160000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1450000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Options (obligation to sell)</value>
                <footnoteId id="F4"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>10.01</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2002-06-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>140000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F5"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-05-31</value>
            </exerciseDate>
            <expirationDate>
                <value>2015-05-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>140000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1450000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Pursuant to a privately negotiated agreement between OYO Corporation U.S.A. and Ernest M. Hall, Jr. dated as of April 16, 1998, as amended by agreement dated as of June 22, 1999, OYO Corporation U.S.A. granted to Mr. Hall options to purchase 160,000 shares of common stock, par value $.01 of OYO Geospace Corporation.  The options vested in equal portions over a three year period.  OYO Geospace Corporation is not a party to this transaction.</footnote>
        <footnote id="F2">The options were originally issued on April 16, 1998 pursuant to a privately negotiated agreement between OYO Corporation U.S.A. and Ernest M. Hall, Jr. with an exercise price of $21.00 per share.  The agreement was amended on June 22, 1998 to reduce the exercise price to $14.00 per share.</footnote>
        <footnote id="F3">The options were granted to Ernest M. Hall, Jr. by OYO Corporation U.S.A. as compensation for services provided to OYO Corporation U.S.A.</footnote>
        <footnote id="F4">Pursuant to a privately negotiated agreement between OYO Corporation U.S.A. and Ernest M. Hall, Jr. dated as of June 28, 2002, OYO Corporation U.S.A. granted to Mr. Hall options to purchase 140,000 shares of common stock, par value $.01 of OYO Geospace Corporation.  The options became fully exercisable on May 31, 2005.  OYO Geospace Corporation is not a party to this transaction.</footnote>
        <footnote id="F5">The options were granted to Ernest M. Hall, Jr. by OYO Corporation U.S.A. as compensation for consulting and advisory services provided to OYO Corporation U.S.A.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Katsuhiko Kobayashi, President</signatureName>
        <signatureDate>2005-08-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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