Danzig
Free City 5 Gulden 1923 AU55 NGC, KM147. Lightly toned, with a minimal amount of even wear. Always a popular type, this issue was struck while Danzig, now part of Poland, was a semi-autonomous city-state for nearly two decades before the escalation of World War II. A few small marks near the base of the fortifications are mentioned for completeness.
Estimate: 400-600 USD