WORLD COINS. RUSSIA. Nicholas I, 1825-55. Gold 3 Rouble / 20 Zlotych, 1837 SPB 3.89 g. Mintage: 30,072. KM C# 136.2. Darker golden toning to some areas. A nice example of this scarce type. Housed in a secure plastic holder, authenticated and graded PCGS AU55, certification number 33625608.