If a male employee with less than 20 years of service dies while in the service after attaining age 65 and leaves a widow eligible for widow’s annuity who does not qualify for minimum annuity for widows under Section 8-150.1 of this Article and whose amount of widow’s annuity was thus fixed and determined when her husband attained age 65, such widow shall have refunded upon her husband’s death the accumulated sums resulting from deductions made from the salary of her husband for age and service annuity purposes after the date on which he attained age 65.