Netherlands New Guinea 1 Gulden

The most intriguing thing about the Netherlands New Guinea 1 Gulden is that it was minted in silver to the same fineness as Dutch coins back home, a deliberate choice to instill a sense of imperial continuity in a far-flung colony. This .720 silver standard meant the coin could pass muster in Amsterdam or Hollandia alike, though it rarely traveled that far. Over the years, I've handled dozens of these; they're straightforward, unadorned pieces with the Dutch coat of arms on one side and the value on the other, reflecting the colony's brief post-war existence.

Production ran from 1948 to 1962 at the Utrecht mint, with designs shifting from Queen Wilhelmina to Juliana as reigns changed. Not every year saw a release, and exact mintages for some are murky—records from that era weren't always kept with precision. The coin's edge bears a simple reeding, practical for wear resistance in a tropical climate.

Some collectors quip it's the most forgettable colonial issue, and they're not entirely wrong.