Watch List notes:

Gaius, 37-41. Mithradates, king of Bosphorus. Stater 41, AR 7.92 g. Laureate head of Gaius r. Rev. BACIΛEΩC – MIΘPIΔATOV Nike advancing l., holding wreath in r. hand and palm branch in l.; in field, H – ΛT. RPC 1909.
Of the highest rarity, apparently only the third and by far the finest specimen
known. Struck on a very broad flan, obverse from a worn die,
otherwise about extremely fine / extremely fine