History of the Citizen Young Seven The Citizen Young Seven line was introduced in the late 1960s to early 1970s, during the golden age of Japanese mechanical watchmaking. At that time, Citizen sought to create a watch series that blended precision engineering, youthful style, and durability. The “Young Seven” was aimed at younger professionals who admired mechanical craftsmanship but wanted something versatile and water-resistant enough for daily use. The “Seven” in its name symbolized seven key features that defined Citizen’s new generation of automatic watches: automatic winding, day-date function, shock resistance, water resistance, anti-magnetic design, durable case, and precision timekeeping. This particular reference, YSEN 51301-T, is a JDM (Japan Domestic Market) exclusive, meaning it was sold only within Japan and rarely exported, making it highly collectible today. Movement is 23 jewels automatic working fine good for daily Usage (not serviced) Description Brand: Citizen Model: Young Seven Automatic Reference: YSEN 51301-C Origin: Japan (JDM Model) Movement: Automatic (23 Jewels) with manual winding option Functions: Hours, minutes, seconds, day-date (English) Dial: Silver sunburst finish with applied bar indices and baton hands Case: Stainless steel, polished finish Crystal: Acrylic domed crystal Water Resistance: Para 40M Water (original rating) not tested Strap: Blue leather strap (replacement, not original) Approximate Production Era: Late 1960s - early 1970s Timestamp: https://imgur.com/a/UKM9DZi Price $320