The 1649 Silver Arendrijksdaalder from Zwolle showcases the city's arms beneath a crowned helmet, indicating its issuance under the authority of the Holy Roman Empire during Emperor Ferdinand III's reign. The coin's hammered technique and silver composition, along with its weight, suggest its role in substantial commerce and its value as a collectible. The rarity index of 100 points to its scarcity and potential uniqueness in numismatic collections.