The Citizen 4-077521 is a caliber of the Normtech movement series, with a height of 3.3 mm. It is available in two versions: 'Swiss Made' with 5 jewels and 'Swiss Parts' with 1 jewel. The movement is powered by a quartz mechanism and features central hours, central minutes, and central seconds. Additionally, it includes a double-digit big-date display positioned at 12:00 and a dual time subdial at 6:00. The battery life is impressively long, lasting up to 10 years.