⅙ Real - Juan I Burgos

Juan I inherited a kingdom whose treasury had been bled dry by his father Enrique II's decades of civil war against Pedro I, and the fractional silver reales of his reign were minted partly to address a chronic shortage of small-denomination currency that made everyday commerce difficult. Burgos held primacy among Castilian mints and produced the bulk of Juan's fractional coinage.

Juan's reign ended at Alcalá de Henares in 1385 when he was thrown from his horse during a military review — an abrupt death that cut short monetary reforms still in progress.