This watch belongs to the Seiko 5 ACTUS series, a product line introduced in the late 1960s as part of Seiko’s effort to modernize its mechanical watches during a period of rapid technological transition. ACTUS models were positioned above the standard Seiko 5, featuring upgraded movements, sharper case designs, and a more contemporary aesthetic aimed at younger professionals of the era. The series reflects Seiko’s design language of the late 1960s to 1970s, when bold case shapes, integrated lugs, and experimental crown placements became prominent. The Caliber 7019 used in this watch is a robust automatic movement with 21 jewels, widely recognized for its reliability and everyday usability. It represents one of Seiko’s mature mechanical calibers produced just before quartz technology began to dominate the global watch industry. As such, watches like this capture the final evolution of Seiko’s mass-produced mechanical movements. A notable design feature of this model is the slanted crown at 4 o’clock, which improves wearing comfort while giving the watch a distinctive asymmetrical profile. Combined with the clean silver dial and applied indices, the watch maintains a timeless, understated appearance that remains appealing today. With its bilingual day display, practical automatic movement, and balanced proportions, this ACTUS is a strong example of Seiko’s functional yet design-driven approach during one of its most important historical periods. This is a vintage Seiko 5 ACTUS automatic wristwatch, powered by the Seiko Caliber 7019 movement with 21 jewels. The watch features a day-date display with bilingual English/Japanese weekday indication, and Seiko’s distinctive slanted crown at the 4 o’clock position. The crown operates as follows: In the normal (unpushed) position, turning the crown allows date adjustment. The crown has one pulled position, which is used for time setting. The day display changes correctly when advancing the hands. During operation, the hands move smoothly with no skipping, slipping, or irregular behavior observed. The case is made of stainless steel and fitted with a brand-new leather strap. Based on the case serial number, this watch is estimated to have been manufactured around 1977. As a vintage item, the watch was running at the time of listing; however, stable continuous operation and time accuracy are not guaranteed. Water resistance is not guaranteed. The watch will be carefully packed and shipped with tracking for safe delivery.