-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Nm1CPmu4s2Ihlzlr6k9skt03IG2FycqFWqcm6D8S8s3akWlMO53kf62P753nnq+N
 eRhrdPRhil/NI1x/kxouKw==

<SEC-DOCUMENT>0001476961-10-000005.txt : 20100216
<SEC-HEADER>0001476961-10-000005.hdr.sgml : 20100215
<ACCEPTANCE-DATETIME>20100216152332
ACCESSION NUMBER:		0001476961-10-000005
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20100216
DATE AS OF CHANGE:		20100216

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			APCO OIL & GAS INTERNATIONAL INC
		CENTRAL INDEX KEY:			0000311471
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				980199453
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-11635
		FILM NUMBER:		10607051

	BUSINESS ADDRESS:	
		STREET 1:		P O BOX 2400
		CITY:			TULSA
		STATE:			OK
		ZIP:			74102
		BUSINESS PHONE:		9185882164

	MAIL ADDRESS:	
		STREET 1:		P O BOX 2400
		STREET 2:		MD 47-17
		CITY:			TULSA
		STATE:			OK
		ZIP:			74102

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	APCO ARGENTINA INC/NEW
		DATE OF NAME CHANGE:	19920703

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NSB Advisors LLC
		CENTRAL INDEX KEY:			0001476961
		IRS NUMBER:				800377379
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		901 SOUTH BOND STREET, SUITE 400
		CITY:			BALTIMORE
		STATE:			MD
		ZIP:			21231
		BUSINESS PHONE:		410-537-5400

	MAIL ADDRESS:	
		STREET 1:		901 SOUTH BOND STREET, SUITE 400
		CITY:			BALTIMORE
		STATE:			MD
		ZIP:			21231
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>cikerror.txt
<DESCRIPTION>CIK ERROR 123109 APCO
<TEXT>
WRONG CIK NUMBER USED FOR FILING

SCHEDULE 13G/A
(Amendment No. 4)*
APCO Argentina Inc.
(Name of Issuer)

filing made 2-16-2009
submission number 0001476961-10-000004

parent company CIK is 0001079818

Please disregard the filing as it was made in error.
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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