Document:

Exhibit 4.1

 

NUMBER UNITS

U-

 

SEE REVERSE FOR CERTAIN DEFINITIONS

 

CUSIP [●]

 

Monocle Acquisition
Corporation

 

UNITS CONSISTING
OF ONE SHARE OF COMMON STOCK AND ONE REDEEMABLE WARRANT TO PURCHASE ONE SHARE OF COMMON STOCK

 

THIS CERTIFIES THAT [●] is the owner of
[●] Units.

 

Each Unit (“Unit”)
consists of one (1) share of common stock, par value $0.0001 per share (“Common Stock”), of Monocle Acquisition
Corporation, a Delaware corporation (the “Company”), and one redeemable warrant (each, a “Warrant”).
Each Warrant entitles the holder to purchase one (1) share (subject to adjustment) of Common Stock for $11.50 per share (subject
to adjustment). Each Warrant will become exercisable on the later of (i) thirty (30) days after the Company’s completion
of a merger, share exchange, asset acquisition, stock purchase, , reorganization, recapitalization or other similar business combination
with one or more businesses (each a “Business Combination”), and (ii) twelve (12) months from the closing
of the Company’s initial public offering, and will expire unless exercised before 5:00 p.m., New York City Time, on the date
that is five (5) years after the date on which the Company completes its initial Business Combination, or earlier upon redemption
or liquidation (the “Expiration Date”). The Common Stock and Warrants comprising the Units represented
by this certificate are not transferable separately prior to _________________, 20__, unless Cowen and Company, LLC elects to allow
earlier separate trading, subject to the Company’s filing of a Current Report on Form 8-K with the Securities and Exchange
Commission containing an audited balance sheet reflecting the Company’s receipt of the gross proceeds of the offering and
issuing a press release announcing when separate trading will begin. The terms of the Warrants are governed by a Warrant Agreement,
dated as of _________________, 2018, between the Company and Continental Stock Transfer & Trust Company, as Warrant Agent,
and are subject to the terms and provisions contained therein, all of which terms and provisions the holder of this certificate
consents to by acceptance hereof. Copies of the Warrant Agreement are on file at the office of the Warrant Agent at One State Street,
30th Floor, New York, New York 10004, and are available to any Warrant holder on written request and without cost.

 

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

 

This certificate shall be governed by and construed
in accordance with the internal laws of the State of New York.

 

Witness the facsimile signature of its duly
authorized officers.

 

	 	 	 
	Chief Executive Officer	 	Chief Financial Officer

 

    	 		 

     

    

 

Monocle Acquisition Corporation

 

The Company will furnish without charge to each
unitholder who so requests, a statement of the powers, designations, preferences and relative, participating, optional or other
special rights of each class of stock or series thereof of the Company and the qualifications, limitations, or restrictions of
such preferences and/or rights.

 

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	 	 	 	 	 
	 	 	 	 	 	 	 	 
	JT TEN	—	as joint tenants with right of survivorship and not as tenants in common	 	 	under Uniform Gifts to Minors Act
	 	 	 	 	 	 	(State)	 

 

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

 

For value received, _________________________________________
hereby sell, assign and transfer unto

 

PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE

 

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

 

Units represented by the within Certificate,
and do hereby irrevocably constitute and appoint

 

Attorney to transfer the said Units 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 EXCHANGE ACT OF 1934, AS AMENDED).	 

 

    	 	2	 

     

    

  

In each case, as more fully described in the
Company’s final prospectus dated _________________, 2018, the holder(s) of this certificate shall be entitled to receive
a pro rata portion of certain funds held in the trust account established in connection with the Company’s initial public
offering only in the event that (i) the Company redeems the shares of common stock sold in its initial public offering and liquidates
because it does not consummate an initial business combination within the period of time set forth in the Company’s Amended
and Restated Certificate of Incorporation, as the same may be amended from time to time (the “Charter”), (ii) the Company
redeems the shares of common stock sold in its initial public offering in connection with a stockholder vote to approve an amendment
to any provision of the Charter relating to stockholders’ rights or the Company’s pre-initial business combination
activity, including the substance or timing of the Company’s obligation to redeem 100% of its shares of common stock sold
in its initial public offering if the Company does not complete its initial business combination within the required time period,
or (iii) if the holder(s) seek(s) to redeem for cash his, her or its respective shares of common stock in connection with a tender
offer (or proxy solicitation, solely in the event the Company seeks stockholder approval of the proposed initial business combination)
setting forth the details of a proposed initial business combination. In no other circumstances shall the holder(s) have any right
or interest of any kind in or to the trust account.

 

    	 	3Exhibit 4.2

 

	NUMBER	NUMBER
	 	C-
	 	SHARES
	 	SEE REVERSE FOR CERTAIN DEFINITIONS
	 	CUSIP [●]

 

Monocle Acquisition
Corporation

 

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 THE PAR VALUE OF $0.0001
EACH OF THE COMMON STOCK OF

 

Monocle Acquisition
Corporation

(THE “COMPANY”)

 

transferable on the books of the Company in person or by duly authorized
attorney upon surrender of this certificate properly endorsed.

 

The Company will be forced to redeem all of its shares of common
stock if it is unable to complete a business combination within the period of time set forth in the Company’s Amended and
Restated Certificate of Incorporation, as the same may be amended from time to time, all as more fully described in the Company’s
final prospectus dated _________________, 2018.

 

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

 

Witness the facsimile seal of the Company and the facsimile signatures
of its duly authorized officers.

 

	 	
        [Corporate Seal]

        Delaware
	 
	Chief Executive Officer	 	Chief Financial Officer

 

    	 	1	 

     

    

  

Monocle Acquisition
Corporation

 

The Company will furnish without charge to each stockholder who
so requests the powers, designations, preferences and relative, participating, optional or other special rights of each class of
stock 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 certificate
of incorporation and all amendments thereto and resolutions of the Company’s 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	 	 	 	 	 
	 	 	 	 	 	 	 	 
	JT TEN	—	as joint tenants with right of survivorship and not as tenants in common	 	 	under Uniform Gifts to Minors Act
	 	 	 	 	 	 	(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 within 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(S) 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:

By

 

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 EXCHANGE ACT OF 1934, AS AMENDED).

 

    	 	2	 

     

    

  

In each case, as more fully described in the Company’s final
prospectus dated _________________, 2018, the holder(s) of this certificate shall be entitled to receive a pro rata portion of
certain funds held in the trust account established in connection with the Company’s initial public offering only in the
event that (i) the Company redeems the shares of common stock sold in its initial public offering and liquidates because it does
not consummate an initial business combination within the period of time set forth in the Company’s Amended and Restated
Certificate of Incorporation, as the same may be amended from time to time (the “Charter”),
(ii) the Company redeems the shares of common stock sold in its initial public offering in connection with a stockholder vote to
approve an amendment to any provision of the Charter relating to stockholders’ rights or the Company’s pre-initial
business combination activity, including the substance or timing of the Company’s obligation to redeem 100% of its shares
of common stock sold in its initial public offering if the Company does not complete its initial business combination within the
required time period, or (iii) if the holder(s) seek(s) to redeem for cash his, her or its respective shares of common stock in
connection with a tender offer (or proxy solicitation, solely in the event the Company seeks stockholder approval of the proposed
initial business combination) setting forth the details of a proposed initial business combination. In no other circumstances shall
the holder(s) have any right or interest of any kind in or to the trust account.

 

    	 	3

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