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Orient Kamasu Automatic Diver vs Tudor Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer)
Orient's diver meets Tudor's chronograph
Quick Verdict
The Orient Kamasu Automatic Diver ($250–$500) offers Orient In-House Automatic precision in the tier below the Tudor Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer) ($2,500–$5,000). The Kamasu Automatic Diver measures 41.8mm and is rated 200m (20 ATM). The Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer) counters with Swiss Made craftsmanship and 200m (20 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Tudor
Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer)
$2,500–$5,000
Specifications Compared
| Feature | Orient Kamasu Automatic Diver | Tudor Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer) |
|---|---|---|
| Price | $250–$500 | $2,500–$5,000 |
| Case Size | 41.8mm | 41mm, 13.6mm thick, 21mm lugs |
| Movement | Automatic Caliber F6922 | Tudor manufacture calibre MT5602-U, automatic, COSC chronometer and METAS Master Chronometer, bidirectional rotor |
| Caliber Type | Orient In-House Automatic | Tudor manufacture MT5602-U, COSC + METAS |
| Power Reserve | 40 Hours | About 70 hours |
| Water Resistance | 200m (20 ATM) | 200m (20 ATM) |
| Crystal | Sapphire Crystal | Domed sapphire |
| Case Material | Stainless Steel | Stainless steel, polished and satin; 60-minute unidirectional steel bezel with burgundy anodised aluminium insert; screw-down crown |
| Origin | Made in Japan | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Orient's design language vs Tudor's approach
The Orient Kamasu Automatic Diver features a Stainless Steel case at 41.8mm with Sapphire Crystal protection. The Tudor Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer) offers Stainless steel, polished and satin; 60-minute unidirectional steel bezel with burgundy anodised aluminium insert; screw-down crown construction at 41mm, 13.6mm thick, 21mm lugs with Domed sapphire. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Caliber F6922 vs Tudor manufacture calibre MT5602-U, automatic, COSC chronometer and METAS Master Chronometer, bidirectional rotor
The Kamasu Automatic Diver runs the Automatic Caliber F6922 (Orient In-House Automatic, 40 Hours power reserve) at 21,600 vph (3 Hz) frequency. The Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer) uses the Tudor manufacture calibre MT5602-U, automatic, COSC chronometer and METAS Master Chronometer, bidirectional rotor (Tudor manufacture MT5602-U, COSC + METAS, About 70 hours reserve) at standard. The Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer) offers a longer power reserve.
Wearability & Fit
41.8mm vs 41mm, 13.6mm thick, 21mm lugs — different wrist presence
At 41.8mm, the Kamasu Automatic Diver has a bolder wrist presence compared to the Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer) at 41mm, 13.6mm thick, 21mm lugs. Water resistance differs: 200m (20 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Orient sits in the lower tier
The Orient Kamasu Automatic Diver sits at $250–$500 and the Tudor Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer) at $2,500–$5,000. On the specs that outlast any price: the Kamasu Automatic Diver uses Sapphire Crystal with 40 Hours, against Domed sapphire and About 70 hours on the Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer). Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 200m (20 ATM)
The Kamasu Automatic Diver is rated to 200m (20 ATM) while the Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer) handles 200m (20 ATM). Both offer identical water resistance ratings.
Our Verdict
Orient
Kamasu Automatic Diver
Choose the Orient Kamasu Automatic Diver if you prioritize Orient In-House Automatic engineering, Made in Japan craftsmanship, and 200m (20 ATM) water resistance. At $250–$500, it delivers Automatic Caliber F6922 with 40 Hours power reserve.
View the dossierTudor
Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer)
Choose the Tudor Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer) if you value Tudor manufacture MT5602-U, COSC + METAS technology, Swiss Made heritage, and 41mm, 13.6mm thick, 21mm lugs proportions. At $2,500–$5,000, the Tudor manufacture calibre MT5602-U, automatic, COSC chronometer and METAS Master Chronometer, bidirectional rotor with About 70 hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Orient Kamasu Automatic Diver and Tudor Black Bay 41mm M7941A1A0RU-0001 (steel, burgundy bezel, black dial, steel bracelet, METAS Master Chronometer) represent two distinct approaches to fine watchmaking — the Orient bringing Made in Japan tradition while Tudor delivers Swiss Made engineering.
Frequently Asked Questions
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How This Page Was Made
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