1454 - 1474 Spanish Blanca del Rombo - Enrique IV (Powerless)
It is a medieval Spanish coin minted during the reign of King Henry IV (Castile and León) between 1454 and 1474.
It derives its name from the distinctive diamond-shaped design on the reverse. Key characteristics: Denomination: 1/2 maravedí (known as a "blanca").
Material: Billon (an alloy of copper with a small amount of silver)
Diameter: 18–19 mm
Weight: Typically ranges from 0.8 to 1.3 grams
Design: The obverse depicts a castle (symbol of Castile) inside a diamond shape
Major mints: Seville, Segovia, Burgos, and Cuenca.