If any unit holder, who is paying for his unit on the monthly payment plan, and who has made all his payments promptly on the dates called for by contract, should die after twelve monthly payments, in addition to the initial payment, and all subsequent payments having become due up to the time of his death have been paid, but before his entire contract price of $650 has been paid in full, the company will, upon satisfactory proof of death (suicide excepted), furnish to his beneficiary a deed to his unit or units and all further payments on same shall cease. This protects the family or estate of the unit holder who meets his monthly payments promptly against all possibility of loss due to his death. The right to change the beneficiary is reserved to the unit holder, provided he notifies the Company in writing.