Exhibit 99.7

NOTICE OF GUARANTEED DELIVERY

This form, or one substantially equivalent to this form, must be used to exercise Subscription Rights pursuant to the Rights Offering described in the prospectus dated [    ], 2017 (the “Prospectus”) of The LGL Group, Inc., a Delaware corporation (the “Company”), if a holder of Subscription Rights cannot deliver the Subscription Rights Certificate(s) evidencing the Subscription Rights (the “Subscription Rights Certificate(s)”) to Broadridge Corporate Issuer Solutions, Inc., the subscription agent (the “Subscription Agent”), at or prior to 5:00 p.m., Eastern Time, on October 10, 2017 (such time, the “Expiration Date”), as it may be extended by the Company in its sole discretion. This Notice of Guaranteed Delivery must be received by the Subscription Agent on or prior to the Expiration Date. See the section titled “The Rights Offering—Guaranteed Delivery Procedures” in the Prospectus. Payment in full of the Subscription Price of $5.50 per whole share for each share of Common Stock subscribed for upon exercise of such Subscription Rights must be received, including final clearance of any checks, by the Subscription Agent in the manner specified in the Prospectus at or prior to the Expiration Date, even if the Subscription Rights Certificate(s) evidencing such Subscription Rights is being delivered pursuant to the procedure for guaranteed delivery thereof. The Subscription Rights Certificate(s) evidencing such Subscription Rights must be received by the Subscription Agent within two (2) business days following the date of this Notice of Guaranteed Delivery. See the sections titled “The Rights Offering—Method of Exercising Subscription Rights” and “The Rights Offering—Form of Payment” in the Prospectus.

The address of the Subscription Agent is as follows:

DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE DOES NOT CONSTITUTE A VALID DELIVERY.

If you have any questions concerning the rights offering, you may contact Broadridge Corporate Issuer Solutions, Inc. by telephone ((855) 793-5068) or by email (shareholder@broadridge.com).

Ladies and Gentlemen:

The undersigned hereby represents that he or she is the holder of Subscription Rights Certificate(s) representing Subscription Rights issued by The LGL Group, Inc. and that such Subscription Rights Certificate(s) cannot be delivered to the Subscription Agent at or before 5:00 p.m., Eastern Time, on the Expiration Date. Upon the terms and subject to the conditions set forth in the Prospectus, receipt of which is hereby acknowledged, the undersigned hereby elects to exercise the following Subscription Rights, pursuant to the Basic Subscription Right and the Over-Subscription Right as described in the Prospectus:

The undersigned understands that payment of the Subscription Price of $5.50 per whole share for each share of Common Stock subscribed pursuant to the Basic Subscription Right(s) and the Over-Subscription Right(s), if applicable, must be received by the Subscription Agent at or before 5:00 p.m., Eastern Time, on the Expiration Date and represents that such payment, in the aggregate amount set forth above, either (check appropriate box):

If by certified bank check, bank draft, or express money order, please provide the following information:

Name of maker:                                                                                                                             

Date of check, draft or money order:                                                                                             

Bank on which check is drawn or issuer of money order:                                                             

Check, wire reference or identifying number:                                                                              

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GUARANTEE OF DELIVERY

(Not to Be Used for Subscription Rights Certificate Signature Guarantee)

The undersigned, a member firm of a registered national securities exchange or of the Financial Industry Regulatory Authority, or a commercial bank or trust company having an office or correspondent in the United States, or a bank, stockbroker, savings and loan association or credit union with membership in an approved signature guarantee medallion program, pursuant to Rule 17Ad-15 of the Securities Exchange Act of 1934, as amended, guarantees that the undersigned will deliver to the Subscription Agent the certificates representing the Subscription Rights being exercised hereby, with any required signature guarantee and any other required documents, all within two (2) business days after the date hereof.

The institution that completes this form must communicate the guarantee to the Subscription Agent and must deliver the Subscription Rights Certificate(s) to the Subscription Agent within the time period shown in the Prospectus. Failure to do so could result in a financial loss to such institution.

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