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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchThe green-dial Orient Star Sports Diver is listed as RE-AU0307E00B by Orient Watch USA and RK-AU0307E by Orient in Japan. Its published specification includes a 43.6 mm case, 200 m water resistance, and an automatic F6N47 movement with a roughly 50-hour power reserve. Those details describe the model, not hands-on test results for an individual watch; regional listings also differ on strap width, so confirm the exact reference before buying accessories or comparing offers.
Which watch is the RE-AU0307E?
It is the green-dial Orient Star Sports Diver. Orient Watch USA identifies its listing as SKU RE-AU0307E00B, while the Japanese product page uses RK-AU0307E. These are market-specific reference forms for the model; check the reference printed on the watch and its paperwork rather than relying only on a seller’s title. Orient’s Japan page dates the model’s release to March 2020, which is historical information and does not establish whether it remains in production. Orient Watch USA listing; Orient Japan specification page.
What are the published specifications?
| Feature | Manufacturer-published detail |
|---|---|
| Case | Orient Watch USA lists 43.6 mm diameter, 14 mm thickness, and 51 mm lug-to-lug. Orient Japan lists 43.6 mm width, 14 mm thickness, and 51.1 mm for its vertical dimension. The small length difference may reflect rounding or a different measurement definition. U.S. page; Japan page. |
| Movement | Mechanical F6N47, automatic with hand winding and hacking (the seconds hand stops when the crown is pulled to set the time). Orient lists approximately or at least 50 hours of power reserve. U.S. page; Japan page. |
| Accuracy | Orient Japan and the official English launch release state static accuracy of +25 to −15 seconds per day. This is a manufacturer specification under static conditions, not a guarantee of how a particular watch will run on the wrist. Japan page; Orient English product release. |
| Water resistance | Orient Watch USA states 200 m and ISO 6425 compliance; Orient Japan describes 200 m scuba-diving water resistance compliant with ISO. These are manufacturer claims, not independent test results for a particular used example. U.S. page; Japan page. |
| Crystal and dial | Sapphire crystal with anti-reflective coating; green dial with luminous elements. Orient Watch USA; Orient product release. |
| Bezel and crown | Orient Watch USA specifies a 120-click unidirectional bezel and screw-down crown. The official launch release also identifies a unidirectional bezel. Published specifications do not establish the feel of the bezel on an individual watch. U.S. page; Orient product release. |
| Warranty | A two-year warranty appears in U.S. and Japanese manufacturer material; terms and eligibility depend on market. Check the current warranty for the region where the watch is purchased. U.S. page; Japan page. |
How should you interpret the size for wrist fit?
The 43.6 mm diameter and approximately 51 mm case length are useful dimensions for comparing the watch with one you already wear. The length across the wrist can matter as much as diameter, while thickness (14 mm) affects how high the case sits. These measurements cannot establish fit on a particular wrist: case shape, bracelet fit, and personal preference all matter. No sample-specific assessment of comfort, bracelet articulation, finishing, bezel action, lume, or timekeeping is established here.
Why do strap-width listings say 20 mm and 22 mm?
The official U.S. listing gives a 20 mm lug width and describes a steel bracelet with a spare rubber strap. The Japanese model material and English launch release list 22 mm band or strap width and describe an exchangeable silicon strap. Because the numbers conflict across regional reference pages, do not assume straps interchange between listings or variants. Confirm the exact SKU and measure or verify the actual watch’s lug width before ordering a replacement.
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- Featuring a Silver-tone Band, Silver-tone Case, Scratch Resistant Sapphire Crystal
What to check before buying a new or pre-owned example
- Match the identity: Compare the reference on the watch and paperwork with the listing: U.S. SKU RE-AU0307E00B or Japanese reference RK-AU0307E.
- Confirm what is included: Ask the seller which bracelet or strap comes with that particular watch; regional materials describe different strap arrangements.
- Check service history: Orient’s official free-repair notice for a malfunctioning part names RE-AU0307E among AU03 diver references. The notice evidence available here does not establish affected serial numbers, batches, regions, dates, or whether a remedy remains available. Review the complete notice and contact the current regional service channel with the watch’s serial number; do not assume every unit is affected. Orient AU03 diver service notice.
- Do not infer dive readiness from the model rating alone: Orient publishes a 200 m scuba-diving rating, but the condition and service status of an individual watch matter. Have a pre-owned watch’s water resistance assessed by an appropriate service provider before relying on it underwater.
Is it currently available, and what does it cost?
When accessed in 2026, Orient Watch USA’s page marked the SKU sold out and showed $745 alongside a struck-through $1,245. This is a dated snapshot of that store page, not a current market valuation, a universal price, or evidence of availability in other regions. Check the seller’s live inventory, exact reference, condition, and included accessories before purchasing.
Quick Recap
Best Value
![Orient Star RK-AU0006S [Watch Contemporary Standard]](https://m.media-amazon.com/images/I/41KyyKM-FdL._SL160_.jpg)
- Target Audience: Men's
- Set Includes: Watch, box, instruction manual (English language not guaranteed)
- . Reinforced waterproofing for everyday use: 10BAR
- , Made in Japan
Rank #4
- MPORTED MEN’S WATCH: This classic mens wrist watch was beautifully crafted and produced in Japan by utilizing the latest Japanese street fashion for the world to consume. Perfect for any occasion, formal or casual, and made to last for years to come!
- PREMIUM MATERIALS: Our stainless steel watch features a steel bracelet band, mineral crystal and a bezel function of 120-clicks, for improved precision!
- AUTOMATIC MOVEMENT: No batteries or winding required with the Japanese-Automatic Movement technology.
- WATER RESISTANT 200M: Made to withstand sweat, water splashes and rain! Suitable waterproof watch for professional marine activity and serious surface water sports, but not diving.
- FEATURES: 41mm Case Diameter. Shows date display on face.
Rank #3
- Orient F6922 Automatic / Hand-Winding / Hacking Movement
- Case Diameter: 41.5 mm | 47 mm Lug to Lug Length | 22 mm Lug Width | 13 mm Thick
- Features: Day | Date | 120-Click Unidirectional Bezel | Screw-down Crown
- Stainless Steel Case | Mineral Crystal
- Water Resistant 200m (660ft): in General, Suitable for Professional Marine Activity and Serious Surface Water Sports, but not Diving
Rank #2
- Powered by the Orient F6722 Automatic, Hand-Winding and Hacking Movement
- 39.9mm Case Diameter (46.5mm lug to lug)
- 20mm Lug Width
- Sapphire Crystal
- Water resistant 200m (660ft): in general, suitable for professional marine activity and serious surface water sports, but not diving
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
