Watch List notes:

Russia, Catherine I, 'Mourning' rouble, 1725, bust l., rev. crowned double-headed eagle (KM.167; Dav.1663), in plastic holder, graded by NGC as About Uncirculated 50 With only one example graded higher by NGC at AU55, this is one of the rarest Russian roubles and impossible to find in this grade. It has the finest reverse, with the sharpest eagle feathers, that experts in the field have ever seen and it is therefore likely to be one of the first strikes. The eagle's feathers have been closely examined and are as struck from the original die. This is by far one of the most beautiful specimens to have ever come on the market, it is a truly wonderful coin and a key to any fine Russian collection.

Estimate: £20,000-30,000