Exhibit 4.5


 


	NUMBER
                                                                                                                                        C-

         

        SEE
REVERSE FOR CERTAIN DEFINITIONS
	SHARES

         

        CUSIP
        81728P 105



 


SENTINEL
ENERGY SERVICES INC.


INCORPORATED
UNDER THE LAWS OF THE STATE OF DELAWARE


COMMON
STOCK 


 


This
Certifies that  _____________________ is the owner of  _____________________ fully paid and non-assessable shares of common
stock of the par of the par value of $0.0001 each of SENTINEL ENERGY SERVICES INC., a Delaware corporation (the
“Company”), transferable on the books of the Company in person or by duly authorized attorney upon surrender of
this certificate properly endorsed.


 


This
certificate is not valid unless countersigned by the Transfer Agent and registered by the Registrar.


  


	 	 	 
	Authorized Signatory	 	Transfer
    Agent 


  




     


     


    

 


SENTINEL
ENERGY SERVICES INC.


 


The
Company will furnish without charge to each shareholder who so requests the powers, designations, preferences and relative, participating,
optional or other special rights of each class of shares or series thereof of the Company and the qualifications, limitations,
or restrictions of such preferences and/or rights. This certificate and the shares represented thereby are issued and shall be
held subject to all the provisions of the amended and restated memorandum and articles of association and all amendments thereto
and resolutions of the Board of Directors providing for the issue of securities (copies of which may be obtained from the secretary
of the Company), to all of which the holder of this certificate by acceptance hereof assents.


 


The
following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were
written out in full according to applicable laws or regulations:


 


	TEN COM	—  	as tenants in common	 	UNIF GIFT MIN ACT	—  	Custodian
	 	 	 	 	 	 	(Cust)	 	
        (Minor)

         

	TEN ENT	—	as tenants by the entireties	 	 	 	Under Uniform Gifts to Minors Act
	 	 	 	 	 	 	 
	 	 	 	 	 	 	 
	JT TEN	—	as joint tenants with right of survivorship and not as tenants in common	 	 	 	(State)




  


Additional
abbreviations may also be used though not in the above list.


 


For
value received, ___________________ hereby sells, assigns and transfers unto ___________________ 


 


(PLEASE
INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER(S) OF ASSIGNEE(S))


 


(PLEASE
PRINT OR TYPEWRITE NAME(S) AND ADDRESS(ES), INCLUDING ZIP CODE, OF ASSIGNEE(S))


 


____________________________
Shares of the capital stock represented by the Certificate, and hereby irrevocably constitutes and appoints


 


___________________________
Attorney to transfer the said stock on the books of the within named Company with full power of substitution in the premises.


  


Dated
___________________


 


	 		
	 	Notice: 	The signature to 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.


 


	Signature(s) Guaranteed:	 
	 
	THE SIGNATURE(S) MUST BE GUARANTEED
    BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP
    IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15 (OR ANY SUCCESSOR RULE) UNDER THE SECURITIES
    ACT OF 1933, AS AMENDED).