Document:

Exhibit
4.1

 

	NUMBER
        U-__________
	 	UNITS
	 	 	 
	SEE
    REVERSE FOR CERTAIN DEFINITIONS	LGL
    SYSTEMS ACQUISITION CORP.	 

 

 

CUSIP

 

UNITS
CONSISTING OF ONE SHARE OF CLASS A COMMON STOCK AND

ONE-HALF
OF ONE REDEEMABLE WARRANT

 

THIS
CERTIFIES THAT                                                                                                                                                                            

 

is
the owner of                                                                                                                   Units.

 

Each
Unit (“Unit”) consists of one (1) share of Class A common stock, par value $0.0001 per share (“Common
Stock”), of LGL Systems Acquisition Corp., a Delaware corporation (the “Company”), and one-half of
one redeemable warrant (“Warrant”). Each whole Warrant entitles the holder to purchase one share of Common
Stock for $11.50 per share (subject to adjustment). Each whole Warrant will become exercisable on the later of (i) 30 days after
the Company’s completion of an initial merger, capital stock exchange, asset acquisition, or other similar business combination
with one or more businesses or entities (a “Business Combination”) and (ii) 12 months from the closing of the
Company’s initial public offering (“IPO”), and will expire unless exercised before 5:00 p.m., New York
City Time, on the fifth anniversary of the completion of an initial Business Combination, or earlier upon redemption or liquidation. The
Common Stock and Warrant(s) comprising the Unit(s) represented by this certificate are not transferable separately until fifty-two
days following the IPO, unless Jefferies LLC informs the Company of its decision to allow earlier separate trading, except that
in no event will the Common Stock and Warrants be separately tradeable until the Company has filed an audited balance sheet reflecting
the Company’s receipt of the gross proceeds of its initial public offering and issued a press release announcing when such
separate trading will begin. The terms of the Warrants are governed by a Warrant Agreement, dated as of ____, 2019, 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 1 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.

 

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

 

	By	 	 	 	 
	 	Chairman 	 	Secretary	 

 

    

     

    

 

LGL
Systems Acquisition Corp.

 

The
Company will furnish without charge to each shareholder 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 ______
	 	TEN
    ENT –	as
    tenants by the entireties	                      (Cust)
                   (Minor)
	 	JT
    TEN –	as
    joint tenants with right of survivorship	under
    Uniform Gifts to Minors
	 	 	and
    not as tenants in common	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 will 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) SHOULD 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).

 

The
holder(s) of this certificate shall be entitled to receive a pro-rata portion of the funds from the trust account with respect
to the common stock underlying this certificate only in the event that (i) the Corporation is forced to liquidate because it does
not consummate an initial business combination within the period of time set forth in the Corporation’s Amended and Restated
Certificate of Incorporation, as the same may be amended from time to time (the “Charter”) or (ii) if the holder seeks
to convert his shares upon consummation of, or sell his shares in a tender offer in connection with, an initial business combination
or in connection with certain amendments to the Charter. In no other circumstances shall the holder(s) have any right or interest
of any kind in or to the trust account.Exhibit
4.2

 

	              NUMBER	SHARES 
	______C	 

LGL
SYSTEMS ACQUISITION CORP.

 

INCORPORATED
UNDER THE LAWS OF DELAWARE

 

CLASS
A COMMON STOCK

 

SEE
REVERSE FOR

CERTAIN DEFINITIONS

 

	              This
    Certifies that	CUSIP
	 	 
	              is
    the owner of	 

 

FULLY
PAID AND NON-ASSESSABLE SHARES OF CLASS A COMMON STOCK OF THE PAR VALUE OF $0.0001 EACH OF

 

LGL
SYSTEMS ACQUISITION CORP. 

 

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 liquidate if it is unable to complete an initial business combination within the time period set forth
in the Company’s Certificate of Incorporation, as the same may be amended from time to time.

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.

Dated:

 

	 	 	 
	CHAIRMAN	 	SECRETARY

 

     

     

    

 

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 ______
	 	TEN
    ENT –	as
    tenants by the entireties	                      (Cust)
                (Minor)
	 	JT
    TEN –	as
    joint tenants with right of survivorship	under
    Uniform Gifts to Minors
	 	 	and
    not as tenants in common	Act
    ______________
	 	 	 	(State)

 

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

 

LGL
Systems Acquisition Corp.

 

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 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 Board
of Directors (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.

 

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)

 

 

 

	 	shares

of the
capital stock represented by the within Certificate, and do hereby irrevocably constitute and appoint

 

	 	Attorney

to
transfer the said stock on the books of the within named Company will 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) SHOULD 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).

 

The
holder(s) of this certificate shall be entitled to receive a pro-rata portion of the funds from the trust account only in the
event that (i) the Corporation is forced to liquidate because it does not consummate an initial business combination within the
period of time set forth in the Corporation’s Amended and Restated Certificate of Incorporation, as the same may be amended
from time to time (the “Charter”) or (ii) if the holder seeks to convert his shares upon consummation of, or sell
his shares in a tender offer in connection with, an initial business combination or in connection with certain amendments to the
Charter. In no other circumstances shall the holder(s) have any right or interest of any kind in or to the trust account.

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