Exhibit 4.3




SEE REVERSE SIDE FOR RESTRICTIVE LEGENDS


FNB BANCORP


INCORPORATED UNDER THE LAWS OF THE STATE OF
CALIFORNIA


          This certifies that the United States Department of
the Treasury is the owner of Six Hundred (600) FULLY PAID AND NON
ASSESSABLE SHARES OF FIXED RATE CUMULATIVE PERPETUAL PREFERRED STOCK, SERIES B,
no par value (LIQUIDATION AMOUNT $1,000 PER SHARE), OF FNB BANCORP, a
California corporation (the “Corporation”). 


          The
shares represented by this certificate are transferable only on the stock
transfer books of the Corporation by the holder of record hereof, or by such
holder’s duly authorized attorney or legal representative, upon the surrender
of this certificate properly endorsed. 


          IN WITNESS WHEREOF, the Corporation has
caused this certificate to be executed by the signatures of its duly authorized
officers. 


          DATED February 27, 2009 


	
 

	
 

	
 


	 

	
 

	 


	
Thomas
 C. McGraw

	
 

	
David
 A. Curtis


	
Chief
 Executive Officer and Secretary

	
 

	
Senior
 Vice President and Chief Financial


	
 

	
 

	
Officer





          UST
Sequence No. 846






THE
SECURITIES REPRESENTED BY THIS INSTRUMENT ARE NOT SAVINGS ACCOUNTS, DEPOSITS OR
OTHER OBLIGATIONS OF A BANK AND ARE NOT INSURED BY THE FEDERAL DEPOSIT
INSURANCE CORPORATION OR ANY OTHER GOVERNMENTAL AGENCY. 


THE
SECURITIES REPRESENTED BY THIS INSTRUMENT HAVE NOT BEEN REGISTERED UNDER THE
SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR THE SECURITIES
LAWS OF ANY STATE AND MAY NOT BE TRANSFERRED, SOLD OR OTHERWISE DISPOSED OF
EXCEPT WHILE A REGISTRATION STATEMENT RELATING THERETO IS IN EFFECT UNDER SUCH
ACT AND APPLICABLE STATE SECURITIES LAWS OR PURSUANT TO AN EXEMPTION FROM
REGISTRATION UNDER SUCH ACT OR SUCH LAWS. EACH PURCHASER OF THE SECURITIES
REPRESENTED BY THIS INSTRUMENT IS NOTIFIED THAT THE SELLER MAY BE RELYING ON
THE EXEMPTION FROM SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A
THEREUNDER. ANY TRANSFEREE OF THE SECURITIES REPRESENTED BY THIS INSTRUMENT BY
ITS ACCEPTANCE HEREOF (1) REPRESENTS THAT IT IS A “QUALIFIED INSTITUTIONAL
BUYER” (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT), (2) AGREES THAT IT
WILL NOT OFFER, SELL OR OTHERWISE TRANSFER THE SECURITIES REPRESENTED BY THIS
INSTRUMENT EXCEPT (A) PURSUANT TO A REGISTRATION STATEMENT WHICH IS THEN EFFECTIVE
UNDER THE SECURITIES ACT, (B) FOR SO LONG AS THE SECURITIES REPRESENTED BY THIS
INSTRUMENT ARE ELIGIBLE FOR RESALE PURSUANT TO RULE 144A, TO A PERSON IT
REASONABLY BELIEVES IS A “QUALIFIED INSTITUTIONAL BUYER” AS DEFINED IN RULE
144A UNDER THE SECURITIES ACT THAT PURCHASES FOR ITS OWN ACCOUNT OR FOR THE
ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT THE
TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A, (C) TO THE ISSUER OR (D)
PURSUANT TO ANY OTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF
THE SECURITIES ACT AND (3) AGREES THAT IT WILL GIVE TO EACH PERSON TO WHOM THE
SECURITIES REPRESENTED BY THIS INSTRUMENT ARE TRANSFERRED A NOTICE
SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. THIS INSTRUMENT IS ISSUED SUBJECT
TO THE RESTRICTIONS ON TRANSFER AND OTHER PROVISIONS OF A SECURITIES PURCHASE
AGREEMENT BETWEEN THE ISSUER OF THESE SECURITIES AND THE INVESTOR REFERRED TO
THEREIN, A COPY OF WHICH IS ON FILE WITH THE ISSUER. THE SECURITIES REPRESENTED
BY THIS INSTRUMENT MAY NOT BE SOLD OR OTHERWISE TRANSFERRED EXCEPT IN
COMPLIANCE WITH SAID AGREEMENT. ANY SALE OR OTHER TRANSFER NOT IN COMPLIANCE
WITH SAID AGREEMENT WILL BE VOID. 


THE
CORPORATION WILL FURNISH TO ANY SHAREHOLDER ON REQUEST AND WITHOUT CHARGE A
FULL STATEMENT OF THE DESIGNATIONS AND ANY PREFERENCES, CONVERSION AND OTHER
RIGHTS, VOTING POWERS, RESTRICTIONS, LIMITATIONS AS TO DIVIDENDS,
QUALIFICATIONS, AND TERMS AND CONDITIONS OF REDEMPTION OF THE STOCK OF EACH
CLASS WHICH THE CORPORATION IS AUTHORIZED TO ISSUE, OF THE DIFFERENCES IN THE
RELATIVE RIGHTS AND PREFERENCES BETWEEN THE SHARES OF EACH SERIES OF PREFERRED
CLASS WHICH THE CORPORATION IS AUTHORIZED TO ISSUE, TO THE EXTENT THEY HAVE
BEEN SET, AND OF THE AUTHORITY OF THE BOARD OF DIRECTORS TO SET THE RELATIVE
RIGHTS AND PREFERENCES OF SUBSEQUENT SERIES OF A PREFERRED CLASS OF STOCK. SUCH
REQUEST MAY BE MADE TO THE SECRETARY OF THE CORPORATION.