Coin sample 1779 (with portrait of Catherine II in adulthood). Was produced in 1779, 1781 and in the years 1783-1793. In a circle the front and back of a rim with notches (on some coins may partially be absent, it is not a marriage).On the obverse
is a portrait of Catherine II in profile, face to the right. Under the portrait letters "СПБ"(Saint-Petersburg). In a circle the inscription - "Б•М•ЕКАТЕРИНА•II•IМП•ИСАМОД•ВСЕРОС"(stands for "the grace of God Catherine II Empress and autocrat of all Russias").The reverse
depicts the coat of arms of the Russian Empire
of second half XVIII century: the double-headed eagle with the lifted wings, crowned by two Imperial crowns, above the same crown but larger. Right Talon the eagle holds a scepter, the left power. On the eagle's breast shield with the Moscow coat of arms: St. George on horseback slaying a serpentine dragon with wings. The shield surrounded by chain of order of St. Andrew. Under the clutches of an eagle letters "М М"(initials of mintmaster mint). At the top of the semicircle indicated the year of coinage - "1783". At the bottom a semicircle of nominal - "ПОЛУПОЛТИННИКЪ"(letters converted basis inside).
Photo from the site: nicoinvest.ru
Varieties of polupoltinnik sample 1779:Portrait with long neck:
1779 (St. PETERSBURG);
1779 (ST. PETERSBURG FL);
1779 (SPB AG);Portrait with a short neck:
1783-1784 (ST. PETERSBURG MM);
1785-1793 (SPB YAA);
1794-1795 (SPB AK);
1796 (SPB IC).