Watch List notes:

Russia, Nicholas I (1825-55), platinum 6-Roubles, 1831, St Petersburg, crowned double eagle with shield of St George and Collar of the Order of St Andrew on breast, rev. value and date (Bitkin 57; KM C178; Sev.603), slightly weakly struck in centre, otherwise very fine, rare.

Spink auction 87, 9 October 1991, lot 826
Estimate: £3,000.00 - £4,000.00