My kopeck of the Mikhail Romanov era has the classification number 331 according to the catalog of V. N. Kleshchinov, I. V. Grishin ' Catalog of Russian medieval coins ...'. M, 1998.
On the reverse – the inscription 'Tsar and Grand Duke Mikhail Fedorovich of All Russia'.
On the obverse there is a traditional rider with a spear for a penny.
And between the legs of the horse for the first time in the minting of Russian coins, the full name of the place of minting is stamped-not the first letters of the city (MO, PS, YAR), but the word Moscow, written in 2 syllables: 'MOS' - at the top, and ' KVA ' - at the bottom.
In the absence of rubles in circulation, which at that time served only as counting money, the ½ - gram kopeck was the largest domestic coin-until the attempt of Mikhail Fedorovich's son, Tsar Alexei Mikhailovich, to introduce the first Russian ruble into circulation in 1654.
Further history developed according to the saying: 'A penny will lead a ruble, and another ruble will lead'.
'Another ruble' - this is already under the grandson of Mikhail Romanov, Emperor Peter I.