Depicts a right-facing portrait of Emperor Franz Joseph. The ruler is wearing a laurel wreath on his head. Below the portrait, the mint mark "K•B•" (Kremnica) is visible. The inscription around the edge reads "Franz Joseph I by the grace of God Emperor of Austria, Apostolic King of Hungary, Croatia, Slavonia and Dalmatia".

Depicts the years "1782" and "1878" separated by two horizontal decorations. These dates refer to the commencement and opening of Joseph II's mine. Surrounded by the inscription "The Mine Named Joseph II in Selmecbánya," separated at the top by a motif of a six-pointed star.

Joseph II's mine redirected the mining waters of the Selmec region into the Garam River, showcasing one of the era's most remarkable technical achievements. Upon its completion, it was the longest adit globally and a significant accomplishment for both Hungarian and Monarchical mining. Stretching from the Garam Valley to the Franz Joseph Shaft, the adit measures 16,538 meters in length and reaches a depth of 76 meters. Constructed over 97 years between 1782 and 1879, the adit was planned in 1780 to surpass the existing ten adits in depth, thus draining a vast area of mining water. Work commenced in 1782 from the Garam River, with the main passage breakthrough on October 5, 1878, and the final handover on October 21, 1879. The construction heavily relied on the surveys conducted by engineers Gyula Gretzmacher and József Tirscher.