F1IV

JM53, MK73, MorganAbt72, Cowley74, Houk88, Garcia89 and GrayGarrison89
do not list any F1IV standards

Gray01/03/06 classify no stars as "F1IV", but they list two F1IV-V:
HD 138803 (HIP 76198) and HD 90071 (HIP 50868)