platinum coin
... that the first Russian platinum coin was sent to the German scientist Alexander von Humboldt and then redeemed by the Russian emperor Alexander II?
... that the first Russian <b id="mwGKg"><a href="./Platinum_coin" id="mwGKk" rel="mw:WikiLink" title="Platinum coin">platinum coin</a></b> <i id="mwGKo">(pictured)</i> was sent to the German scientist <a href="./Alexander_von_Humboldt" id="mwGKs" rel="mw:WikiLink" title="Alexander von Humboldt">Alexander von Humboldt</a> and then redeemed by the Russian emperor <a href="./Alexander_II_of_Russia" id="mwGKw" rel="mw:WikiLink" title="Alexander II of Russia">Alexander II</a>?