This timepiece is a magnificent artifact from January 1973, as confirmed by the serial number 30131579. The Seven Star V2 series is defined by its robust "V2" (Vibration Proof/Victory) architecture and a breathtaking gradient emerald green green dial that transitions from deep emerald to a shimmering lime under direct light. It is powered by the high-spec 26-Jewel Caliber 7700, a mechanical powerhouse engineered with a higher jewel count than its contemporaries to ensure reduced friction and a sweep second hand that glides with buttery smoothness across the high-contrast markers.

The architecture is quintessentially bold, utilizing a substantial stainless steel cushion-style case with sharp, polished facets that offer a commanding presence on the wrist. The dial is a work of high-end JDM art, featuring massive hand-applied "shield" indices, a dual Kanji/English day-date wheel at 3 o'clock, and the proud "V2" logo which signaled the height of 1970s technical performance. Flipping the watch over reveals the crisp caseback engravings and the GN-4-S case designation, definitively confirming its authentic Japanese Domestic Market (JDM) heritage. This is an essential acquisition for an elite collector who appreciates Japanese mechanical history, the soul of a 26-jewel heart, and the bold, shimmering presence of the Seven Star V2.