USA. With a mintage of 930,150 pieces and a survival population of 4,500 pieces in Mint State the 1892-S Double Eagle might appear as a common coin.
Nevertheless, coming to MS64 or finer the population lowers drastically to less than 300 pieces (including resubmissions).
Even if it is not one of the rarest coin in terms of mintage or surviving population it remains very sought since it rarely appear on the market in this condition.
Gold. 34 mm. 33.44 gr. (900‰).