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| 正面描述 | The obverse features two prehistoric pelycosaurs in high relief as the central device: a large Dimetrodon with its distinctive dorsal sail dominates the field, accompanied by an Edaphosaurus. The legend PELYCOSAURS (DIMETRODON) arcs along the upper rim, with (EDAPHOSAURUS) and 280 MILLION B.C. along the lower rim, and the initials NRJ appear in the left field. |
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| 正面文字 | 登录 以查看详情 |
| 正面铭文 | PELYCOSAURS (DIMETRODON) NRJ (EDAPHOSAURUS) 280 MILLION B.C. |
| 背面描述 | The reverse presents a detailed dinosaur family tree diagram with multiple prehistoric creatures depicted in relief across the field, each labeled with group and genus names. The title legend WHEN THE WORLD WAS YOUNG arcs along the left and upper rim, while DINOSAURS FAMILY TREE appears along the lower rim, with two time horizon dotted lines marking 135 MILLION B.C. and 180 MILLION B.C. |
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| 铸造机构 | 登录 以查看详情 |
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