100 000 000 Korun 100 Years of Czechoslovak Currency

Issued to mark the centenary of the Czechoslovak koruna, first introduced in 1919 when the newly formed republic needed to sever its monetary ties with the Austro-Hungarian krone. The transition was managed by finance minister Alois Rašín, who oversaw a rapid currency stamping operation — existing Austro-Hungarian banknotes were physically stamped and briefly circulated as Czechoslovak currency while the new coinage infrastructure was established.

At 535mm across and 130 kilograms of .9999 fine gold, this is among the largest gold coins ever struck by any sovereign mint. Only five pieces were produced.