VOSTOK 2431 - 24hr automatic movement with calendar, 2431 / 2

VOSTOK automatic movement, 24hr time indication, central seconds, calendar, date in pos. "6:00", white disc with black numbers, diameter 24mm, height 6,3mm, 32 jewels, middle accuracy -20...+60s / day, Frequency: 19800 semi-oscillation per hour, power reserve 31 hr