The International Durowe 7527-3 watch movement features an excenter winding mechanism. It is an adaptation of the Otero family single calibers, which were utilized to meet temporary demand, leading to various Dugena designations for the same Otero calibre. The movement is automatic and includes functions such as a sweep second hand and a date display that can be set by changing the time to 20:30-24h. It was commonly used around the year 1970.