Catalog
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| Issuer | Royal Mint |
|---|---|
| Year | 1966 |
| Type | Coin pattern |
| Value | Log in to see details |
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| Composition | Log in to see details |
| Weight | Log in to see details |
| Diameter | Log in to see details |
| Thickness | Log in to see details |
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| Obverse description | Log in to see details |
|---|---|
| Obverse script | Latin |
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| Reverse description | The center of the otherwise completely plain and unlettered field bears a small rectangular cartouche in relief, enclosing the heraldic device of the Tower of London — the Royal Mint's official logo — depicting a crenellated castle facade with two flanking towers each surmounted by a cross, with additional cross finials at the base. The surrounding field is entirely blank, with no legend, date, or further inscription, consistent with the experimental nature of this pre-production pattern piece. |
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| Additional information |
Australia's 1966 decimal changeover required the Royal Mint to prototype several denominations before finalizing specifications. This 20-cent pattern was part of that process — the eventual circulating issue landed at 11.31 g, meaning this piece sits slightly heavier, suggesting it predates the final production standard.