RUSSIA. 10 Rubles, 1766. St. Petersburg Mint. Catherine II (the Great). NGC EF-45 Gold Shield.Fr-129a; KM-C-79a; Bit-14. Variety with inverted "п" in mintmark. This SCARCE variety features an inverted middle letter in the mint signature below the bust of Catherine. Evenly handled throughout, with a subtle golden nature near the peripheries.