CoinWorldTV 1976, Czechoslovakia (Soc. Rep.). Silver 100 Korun “Viktor Kaplan” Coin. Mint Year: 1976 Condition: Proof! References: KM-88. Denomination: 100 Korun Material: Silver (.700) Diameter: 33mm Weight: 15gm Viktor Kaplan (27 November 1876 – 23 August 1934) was an Austrian engineer and the inventor of the Kaplan turbine. Kaplan was born in Mürzzuschlag, Austria into a ra ...