If any member of this plan shall die before retirement and if no allowance shall be payable under Sections 2.124.760 and 2.124.770 of this chapter and if death shall occur not later than the last day for which he or she receives compensation, or within four months after the last day for which the member receives compensation, or while the member is physically or mentally incapacitated for the performance of his or her duties, and if such incapacity has been continuous from such last day to the date of death, a death benefit shall be paid to his or her surviving spouse, or if he or she leaves no surviving spouse, to his or her estate or designated beneficiary, consisting of an amount equal to one-twelfth of the compensation earnable by him or her during the twelve (12) months immediately preceding death multiplied by his or her completed years as a member of the system not to exceed six, plus his or her accumulated contributions and interest credited thereon. (Prior code § 34.05.527)