in diameter than the one-dollar coin, but the two-dollar is slightly thicker. Due to the metal exceeding face value, the minting of one- and two-cent coins was discontinued in 1991, and they were withdrawn from circulation. However, , both coins were minted as collectors' items. Australian coins have medallic orientation, as do most other Commonwealth coins, Japanese yen coins, and euro coins. That is in contrast to coin orientation, which is used in United States coinage. After the death of Elizabeth II, new Australian coins will have the effigy of King Charles III on their obverse, starting from 2023. Table Commemorative coins Commemorative coins have been produced for various denominations in various years with imagery representing an event replacing the usual design on the reverse side of the coin. In some years, all the coins of that denomination are replaced with a different design for that year. In other cases, only a few million coins have the commemorative design, and coins with the standard reverse are also released. No commemorative issues of the 1c coin have been produced, and with the exception of the 2016 issue, there have been no commemorative issues of the 5c and 10c coins. A special 2c coin was released, showcasing one of Stuart Devlin's alternative designs. Many commemorative versions of the 50c coin have been placed in general circulation since 1970. The first coin commemorative issue was in 1986, the first 20c commemorative issue in 1995, and the first commemorative issue in 2012. Mintages reported for these coins vary from around 500,000 to around 50 million. In 1992 the Mint commenced production of commemorative issues which were not for circulation. Mintages reported for these coins vary from around 5,000 to around 125,000, with the notable exception of the four 25c coins of 2016 which have mintages of 1 million each. In 2016, to celebrate 50 years of decimal currency, a commemorative design for the obverse of the coins was released. To date this is the only issue where the commemorative design is on the obverse face rather than on the reverse face. Collectable coins The Royal Australian Mint regularly releases collectable coins, one of the most famous of which is the 1980–1994 gold two-hundred-dollar coin series. Australian collectable coins are all legal tender and can be used directly as currency or converted to "normal" coinage at a bank. Metals include aluminium bronze, silver, gold and