Watch List notes:

(g) USSR, Soviet Union, Gold Proof 100-Roubles, 1977, Commemorating the 1980 Moscow Olympics, National Arms dividing CCCP, value below, rev. Moscow Olympic Logo, edge milled, 17.50g, 12h (KM Y A163), brilliant uncirculated, in Official Case of Issue and Certificate of Authenticity, no. 25466.

Estimate: £700 - £800