"20" on the reverse face. These coins are now sold for over $200, depending on condition. Other varieties of the reverse face generally involve the length and number of the claws of the platypus. These are prone to change if incorrect stamping pressure is used in creation of dies for the coins. Such variations are most frequently seen on coins produced at foreign mints. For the Broadley head obverse, to date there have been several variations: 1999 with thicker lettering. 2000–2003 slightly reduced lettering by 0.01 mm. The 2004 issue had two forms: "the small head": a head reduced all around by 2 mm, and thicker lettering. The version was in general circulation. "the large head": an issue identical to the 2000–03 obverse. This version was only available in mint packs though, it is rarely found in circulation. 2005 non-commemorative and subsequent issues have reverted to "the large head" obverse. The 2005 WWII commemorative issue had an even larger head. 1981 Mintings In 1981, a large number of 20-cent coins were required, far more than the capacity of the Royal Australian Mint facility in Canberra, leading to some coins being minted at other facilities. The Canadian impression of the 20-cent coin is known as the "Ottawa Mint" version, which may be misleading as, post 1976, the Ottawa Mint only produced precious metal commemorative coins, like the Perth Mint, meaning the coins may have been produced at the Royal Canadian Mint's Winnipeg facilities. Due to differences in the milling and annealing process, the Canadian variety of the 1981 20-cent coin is distinctive to attentive collectors and even cash handlers. The top and bottom edges of the milling is rounded over, not squared like the Australian and London varieties, and despite being in circulation for well over 25 years, even when well worn, the fields remain shiny, and not dulled like those produced at other mints. These qualities are also observed in Canadian coinage of similar ages. Some of the Canadian coins were produced with a shortened first toe on the right claw. These are referred to as the " claw" variety. Mintages The quantity of 1981 and 1982 mintages of the 20-cent coin was sufficient to not require many coins released for circulation until 1990. The 1983 and 1984 coins were struck for circulation with mintages of 55.11 million and 27.82 million coins respectively, but were never released for general circulation.