Real 'F' - Fernando I Lisboa mint

Fernando I's early reals were struck at a moment of acute monetary instability — his reign opened with war against Castile and a currency so debased by his predecessor Pedro I that Fernando was compelled to issue reformed silver almost immediately upon taking the throne. The Lisboa mint was the primary production center, but output was inconsistent, and the coinage circulated alongside older Fernandine issues in a way that created persistent confusion among merchants and tax collectors alike.

The Gomes 88 attribution places this among the earliest of Fernando's silver reals, predating the monetary reforms of the 1370s that would restructure Portuguese coinage more substantially.