Вариации штемпеля Б 5 рублей 1988 г. Новгород.
Финское нумизматическое общество.
Abstracts. It is proved that the die Б2 has different grindings of the end of die surface. A hypothesis was proposed that all coins "Novgorod" in mass production are actually struck by the same die Б3 with different degrees of grinding of the end of die surface.