Orient Star Sun & Moon Open-Heart RK-AT0001S (RK-AT0001S, RE-AT0001S, RN-AT0001S). Current Prices, JDM Listings, Market Analysis
The Orient Star Sun & Moon Open-Heart RK-AT0001S is a dress watch from Orient's premium Star line, notable for its open-heart dial that exposes the escapement and a sun-and-moon complication that tracks day and night cycles. It circulates under several reference numbers including RE-AT0001S and RN-AT0001S, depending on market and variant, which matters when searching across Japanese platforms. Tonbo tracks this model because the JDM channel offers periodic access at prices below the US median, though the comp base is currently thin. At a US median of $375, it sits at an accessible price point for an Orient Star complication piece.
Current US Market Value
The current US median for the Orient Star Sun & Moon Open-Heart RK-AT0001S price is $375, with the middle 50 percent of transactions falling between $300 and $500. That spread is relatively wide for a watch at this price tier, which reflects the limited sample size underlying these figures. The comp quality is rated 🟡 Limited comps, meaning the dataset draws from manual seeding rather than a dense pool of recent sales. Treat the $375 median as a directional benchmark rather than a firm anchor. As more transactions are recorded, that range will tighten. Buyers should weight recent completed sales on US platforms carefully before using that figure to evaluate any individual deal.
Active JDM Listings
There are no active Japanese marketplace listings for the RK-AT0001S captured within the past 14 days. This can reflect genuine scarcity of supply at any given moment, or it can mean the watch is moving under alternate reference number searches across platforms like Mercari Japan, Yahoo Auctions Japan, and Rakuten. Searching RE-AT0001S and RN-AT0001S in parallel is worth doing, since Japanese sellers do not always apply consistent reference numbers. When supply does appear, it tends to surface in the following patterns:
- Single-owner listings described as lightly worn, often from Japanese buyers who purchased new and upgraded
- Box-and-papers sets that carry a meaningful premium over strap-only or accessories-missing examples
- Listings priced in the 30,000 to 50,000 yen range historically, though current supply is absent
- Occasional dealer or reseller listings on Rakuten that sit closer to or above US retail equivalents
- Variant confusion between the RK-AT0001S, RE-AT0001S, and RN-AT0001S that can suppress competition on any single listing
Subscribers tracking this model through Tonbo's live signals feed will get notified when qualifying listings reappear.
Recent Alert History
No strict or opportunity alerts have fired for the Orient Star Sun & Moon Open-Heart RK-AT0001S in the past 90 days. This is an honest reflection of the current data state, not a judgment on the model's value. Alert generation depends on active Japanese listings crossing price thresholds relative to the US comp base. With no recent JP listings captured and a thin comp pool on the US side, the conditions for triggering a signal simply have not been met. This does not mean the model should be ignored. It means the market is currently quiet and buyers should set up monitoring now so they are positioned when supply returns. You can browse recent trigger history across the broader Orient catalog on the Tonbo deals page.
Japan vs. US Price Gap
The core opportunity for anyone looking to buy RK-AT0001S from Japan is the structural gap between Japanese second-hand pricing on Orient Star pieces and US resale values, a gap that exists partly because Japanese sellers undervalue domestic watch brands relative to Swiss alternatives. Orient Star complications like the Sun & Moon are well-regarded domestically but do not command the same secondhand premiums in Japan that they can fetch from informed international buyers. The main risk here is comp thinness. With limited transaction data on both sides, it is harder to confirm whether a given Japanese listing represents genuine upside or simply a seller who has also done their research and priced accordingly. Condition variance is the second watch point, since dial and case condition on open-heart movements affects both aesthetics and perceived value significantly, and photographs on Japanese listings vary in quality.
Get Real-Time Alerts for Orient Star Sun & Moon Open-Heart RK-AT0001S
Tonbo monitors Japanese marketplaces continuously for the RK-AT0001S and its variant references. When a listing appears that clears the threshold relative to the US comp base, subscribers get the alert before the broader market sees it. Paid alert tiers with full listing access and price thresholds are available at tonbomarket.com/pricing. If you want to stay informed at no cost, the free newsletter at tonbomarket.com covers JDM market movements across Orient, Seiko, Citizen, and other tracked brands on a regular cadence.