The Orient Star RK-AT0202E Green Dial Open Heart Auto Men's Watch is a refined Japanese mechanical watch
celebrated for its vibrant forest-green sunburst dial, signature open-heart aperture, and high-value in-house Calibre F6R42 automatic mechanical movement. Japanese in-house automatic mechanical movement engineered specifically for Orient Star semi-skeleton (open-heart) watches. It combines a 50-hour power reserve indicator with a true no-date architecture, hand-winding, and hacking seconds.
Rated at
+25 to -15 seconds per day; however real-world testing by watch reviewers frequently records much tighter daily variance within single digits.
Comes with original box, warranty, service records, and manual, making it a complete package for watch enthusiasts.