The A. Schild 1555N watch movement, utilized from 1978 to 1998, features a micrometer regulator for enhanced precision. This movement offers a range of functions, including an automatic chronograph with 60-second, 60-minute, and 12-hour capabilities, controlled by a pillar wheel mechanism. The timepiece also incorporates a sub-second display, along with convenient quickset features for both the day and date. It is also equipped with a hack feature, ensuring accuracy when setting the time. The movement is shock-resistant, operates automatically, and provides a day and date display.