The 1/2oz Eagle gold coin is produced by the U.S Mint and has a face value of $25. It features the Eagle design on the reverse and Saint Gaudens' Liberty on the obverse. The half ounce coin was first minted in 1986. Between 1986 and 1991 the Eagle coins show the date in Roman numerals; from 1992 onwards the date is shown in Arabic numerals.
The South African Krugerrand was first produced in 1967 by the South African Chamber of Mines. Over many decades this gold coin has become one the most popular bullion coins chosen by investors. After its original productions and subsequent success, the Krugerrand galvanised many other gold mints to produce a bullion coin of equal standing. The 1oz Krugerrand was first minted in 1967; the 1/2oz, 1/4oz and 1/10oz coins were first produced in 1980.
This 4 Ducat coin is produced by the Viennese Mint in Austria. A particularly interesting detail about this coin is that the carat of the gold is much higher than other European gold coins. They are produced in 23.6 carat (a fineness of 0.986). It is a large coin but it is not very thick. Ducat coins have been issued in Austria since at least 1612. The last regular issue of Ducats was in 1914, and all the 4 Ducats dated 1915 are restrikes. Four ducat coins dated 1915 are still being produced by the Austrian Mint today. The design shows the laureate head of Emperor Franz Joseph I on the obverse and an image of the crowned imperial eagle on the reverse.