Austria
Franz Joseph I gold Mint Error Restrike Ducat 1951 (1915) MS66 NGC, KM2267. Transposed Digits in Date Error. The first error of this kind that we've seen or heard of on this type, with the 1 and 5 digits that typically make the 15 date transposed to read 51. Despite being common without the error, undoubtedly extremely rare and potentially unduplicated in this form. As such, sure to capture the attention of collectors seeking major anomalies in coinage.
HID02901242017
Estimate: 1500-3000 USD