The Seiko 6119 series represents the early generation of the Seiko 5 line, produced from the late 1960s into the early 1970s as Seiko expanded its automatic watches to global markets. The “5” concept—automatic winding, day-date display, water resistance, shock resistance, and a durable case—made the Seiko 5 one of the most widely used everyday watches of its era. This piece is equipped with the Cal.6119, a movement known for its smooth winding feel and stable performance, and widely adopted across many countries for its reliability. The silver sunburst dial, sharp applied baton indices, and clean case geometry together create the classic practical-dress style that defined Seiko during this period. One notable feature of this example is its Japanese-only day display, a characteristic of domestic-market Seiko 5 models. The “木 / 日” indication adds a charming detail that differs from the more common bilingual international versions. The quickset for the date is not functioning, so both the date and day advance through crown rotation. This provides a vintage-style operating feel characteristic of the period. With a case size of approximately 35 mm, it wears cleanly thanks to its slim bezel and balanced proportions. A new leather strap has been fitted, giving the watch a clean and well-matched appearance. A straightforward, practical example of the 6119 generation—showing the functional charm and simplicity that define vintage Seiko. Running at the time of listing. As a vintage watch, stable operation, accuracy, and water resistance are not guaranteed. The watch will be carefully packed and shipped with tracking for safe delivery.