a uniform button featuring the basic, historical Coat of Arms of Spain (or a simplified version used for military insignia).

Detailed Identification & Dating

1. Emblem Identification: The design is the historical Spanish coat of arms, which is quarterly (divided into four parts) representing the four main medieval kingdoms:

• Castile (Castle)

• León (Lion)

• Aragon (Vertical Pallets/Bars)

• Navarre (Chains/Cross and Orle)

• Note: Later versions often have the Pomegranate of Granada at the base and a central inescutcheon for the ruling dynasty (e.g., Bourbon).

2. Attribution: The button is almost certainly a Spanish military or institutional uniform button. The simple, crowned quartered shield was a common emblem for various branches of the Spanish Army (like the Infantry) for over a century.