F in RIC is a misprint. Cohen correctly gives FIL. This long legend always ends with FIL, not with F as RIC erroneously states.
For the gold and silver coins, RIC gives the correct obverse legend, ending FIL not F (p. 92, legend 6).
It would have helped if you had stated immediately that your coin was like RIC 1372b, but with obv. legend ending FIL not F.