Other milestones for the Spring Drive followed in quick succession. In 2002, Seiko launched the first non-limited Spring Drive watch, Ref. SMK005J, which came in an 18k white-gold case. In 2004, Seiko cleared another major technical hurdle with the introduction of Caliber 9R65, the first Spring Drive movement with automatic winding. Speaking to Seiko's pride in its accomplishment, that movement debuted inside a Grand Seiko watch (Ref. SBGA001, below) — and thus, as per protocol at the time, was accessible only to buyers in Japan. In addition to the automatic winding system, Caliber 9R65 also boasted a higher power reserve (72 hours) than its predecessors and a daily accuracy of +/1 second. Caliber 9R65, which powers the time, central seconds, date display, and dial-side power-reserve indication, remains the most common Spring Drive movement in Grand Seiko models.