What is a coin with 1836 gulielmus?

A coin marked "1836 Gulielmus" likely refers to a currency from the Netherlands, specifically a silver coin featuring King William I (Gulielmus in Latin). The year 1836 indicates when the coin was minted. These coins were part of the Dutch currency system during the 19th century and often featured royal imagery and inscriptions. Collectors may find such coins valuable due to their historical significance and rarity.