In 1798 there was a project in Russia to make Ecus, i.e., Iesimki, of 54 3/4 Stuivers, to be used for foreign trade. Only a few essays, however, were struck, and the Iesimok, as this silver piece is called, is very rare. See Chaudoir, Apercu sur les monnaies russes . 1836. (i. 173).
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)