Watch List notes:

Alexander I (1801-1825), pattern rouble, 1804, in gilt bronze, by C.H. Küchler, struck by Matthew Boulton (Bitkin Ж927, this piece cited), almost as struck, with original tinned copper 'shells' Ex World-Wide Coins of California auction VIII, 12 November 1985, lot 630.
Estimate: 1500-2000 GBP