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1 Dollar - Elizabeth II 4th Portrait - ... Of rugged mountain ranges
| Issuer | Perth Mint, Australia |
|---|---|
| Year | 2015 |
| Type | Non-circulating coin |
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|---|---|
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| Obverse lettering | ELIZABETH II AUSTRALIA IRB 1oz 9999 SILVER 2015 1 DOLLAR |
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| Reverse script | Latin, Latin (cursive) |
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| Additional information |
Part of Perth Mint's "Treasures of Australia" series, this issue celebrates the Kimberley region of Western Australia — one of the most geologically ancient landscapes on Earth, with formations dating back over 1.8 billion years. The pad-printing technique, applied over struck silver, allows photographic-quality color reproduction directly onto the coin surface without the tonal limitations of traditional enameling.
Pad printing on bullion-weight silver remained a relatively niche production method at the time; Perth had been refining the process since the early 2000s to reduce edge bleed and adhesion failures that plagued early colorized issues.