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| 表面の説明 | The obverse features a detailed frontal view of the Prince's Palace of Monaco rendered in fine relief within the copper-nickel middle ring, with a small copper-aluminium core plug at centre. A princely crown appears at top centre of the outer ring. The legend PALAIS PRINCIER arcs along the upper outer ring and DEO JUVANTE along the lower outer ring, both in Latin, referencing the Monegasque motto 'With God's Help'. The engraver's signature R.B. BARON appears in the lower field of the middle ring. |
|---|---|
| 表面の文字体系 | ログイン して詳細を見る |
| 表面の銘文 | PALAIS PRINCIER DEO JUVANTE R.B.BARON (Translation: Prince's Palace With God's Help) |
| 裏面の説明 | ログイン して詳細を見る |
| 裏面の文字体系 | ログイン して詳細を見る |
| 裏面の銘文 | ログイン して詳細を見る |
| 縁 | ログイン して詳細を見る |
| 鋳造所 | ログイン して詳細を見る |
| 鋳造数 | ログイン して詳細を見る |
| 追加情報 |
Monaco's trimetallic 20 franc coin arrived as part of a broader European experiment with multi-alloy coinage in the early 1990s, driven largely by vending machine manufacturers lobbying for coins with distinct electromagnetic signatures that couldn't be spoofed by slugs. The specification — three discrete alloy bands — was engineered to defeat counterfeiting through conductivity layering rather than precious metal content. France adopted similar trimetallic construction for its own 20 franc pieces in the same period, and Monaco, whose monetary union with France obligated close alignment, followed suit. The series ran only until the franc's effective obsolescence ahead of euro adoption.