Yes

Before 1964, watches produced by the factory often featured the markings 1MChZ or 1MChZ im. 1MChZ stands for First Moscow Watch Factory (Russian: Первый Московский Часовой Завод). For collectors, the 1MChZ marking is significant because it generally indicates a watch manufactured before 1964, making it an early example from one of the Soviet Union's most historically important watch manufacturers.

Before 1964, watches produced by the factory often featured the markings 1MChZ or 1MChZ im. 1MChZ stands for First Moscow Watch Factory (Russian: Первый Московский Часовой Завод). For collectors, the 1MChZ marking is significant because it generally indicates a watch manufactured before 1964, making it an early example from one of the Soviet Union's most historically important watch manufacturers.