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25 Dollars - Elizabeth II Autitium
| Issuer | Central Bank of Solomon Islands |
|---|---|
| Year | 2020 |
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| Reference(s) | KM# 1021 |
| Obverse description | The upper half of the obverse features a central medallion bearing the fourth-generation effigy of Queen Elizabeth II facing right, as sculpted by Ian Rank-Broadley, with the engraver's initials IRB visible below the truncation. The surrounding legend reads ELIZABETH II to the left and SOLOMON ISLANDS / 25 DOLLARS to the right, with the date 2020 below the portrait. The lower half of the field displays two interlocking mechanical gear wheels in relief, accompanied by the fineness inscription .990 AU and the element symbol TI for titanium. The entire field is richly decorated with an elaborate engine-turned guilloche pattern of undulating and crosshatched lines, creating a dynamic interplay between the polished and frosted surfaces. |
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| Mintage | 2020 - Prooflike - 1,000 |
| Additional information |
The term "Autitium" refers to gold-titanium alloy coinage — a niche product that emerged in the early 2000s as a way to harden fine gold blanks while introducing a subtle color variation. The titanium content does nothing for collectible value in any conventional sense, but it does make the planchet marginally more resistant to contact marks than standard .999 gold. Solomon Islands has issued a large volume of themed bullion and collector coinage through licensing arrangements with European minting agencies, primarily the Mint of Poland and B.H. Mayer's Kunstprägeanstalt in Munich.