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1 Dollar - Elizabeth II 4th Portrait - International Year of Astronomy - Silver Proof
| Issuer | Perth Mint, Australia |
|---|---|
| Year | 2009 |
| Type | Non-circulating coin |
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| Obverse description | The fourth-generation effigy of Queen Elizabeth II faces right, wearing the Girls of Great Britain and Ireland tiara, as designed by Ian Rank-Broadley. The legend ELIZABETH II AUSTRALIA 2009 1 DOLLAR arcs around the upper and lower periphery of the field, with the designer's initials IRB truncated below the portrait. |
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| Edge | Reeded |
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| Additional information |
The International Year of Astronomy in 2009 marked the 400th anniversary of Galileo's first use of a telescope for systematic celestial observation, and of Kepler's publication of Astronomia Nova. The Perth Mint used pad printing — a process borrowed from industrial product decoration — to apply color detail directly to the coin's surface, a technique it had been refining since the early 2000s for its wildlife and commemorative issues.