| Issuer | Australia |
| Year | 1999-2000 |
| Type | Non-circulating coin |
| Value | 25 Dollars |
| Currency | Dollar (1966-date) |
| Composition | Platinum (.9995) |
| Weight | 7.78 g |
| Dimensions | 20.1 mm |
| Thickness | 1.9 mm |
| Shape and Technique | Round Milled |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | |
| In circulation to | |
| Reference(s) | KM#471 |
| Obverse description | 4th portrait of Queen Elizabeth II facing right wearing the Girls of Great Britain and Ireland Tiara |
| Obverse script | Latin |
| Obverse lettering | ELIZABETH II AUSTRALIA 25 DOLLARS IRB |
| Reverse description | Koala sitting eating gum leaves |
| Reverse script | Latin |
| Reverse lettering | THE AUSTRALIAN KOALA 1/4 OZ. 9995 PLATINUM P100 1999 |
| Edge | Reeded |
| Mint | P100 Perth Mint, Australia(1899-date) |
| Mintage | 1999 P100 - Proof - In Twin Set - 187 1999 P100` - Proof - In 5 Coin Set - 108 2000 - BU - 762 2000 - BU - In Twin Set - 187 2000 - Coloured (Mintage unknown) - |
| Catalog ID | 1228585930 |
| Comments |
