Department circulars, Public debt series. 10-64. United States of America 4ΒΌ percent Treasury bonds of 1987-92, dated Aug. 15, 1962, with interest from July 22, 1964, due Aug. 15, 1992, redeemable at option of United States at par and accrued interest on and after Aug. 15, 1987, interest payable Feb. 15 and Aug. 15.