The alarm clock BMK-1 intended for keeping the time in hours and minutes as well as function of an alarm clock. It works around the clock for a minimum of seven days after a complete winding up of the clock’s mainspring. Deviation of alarm start up from the set alarm position is not more than 3 minutes. Russian Origin 8 Jewels Movement’s deviation due to temperature fluctuations should not exceed K 45 seconds within the temperature limits of K 25°C. Diameter is 110mm. Made in Russia