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Omega Seamaster Diver 300M 42mm (Sedna gold, rubber) vs Orient Mako 40 Green
Omega's chronograph meets Orient's diver
Quick Verdict
The Orient Mako 40 Green ($250–$500) delivers Orient In-House Automatic (Hacking, Hand-Winding) technology in the tier below the Omega Seamaster Diver 300M 42mm (Sedna gold, rubber) ($25,000+). The Mako 40 Green measures 40mm and is rated 200m (20 ATM). The Seamaster Diver 300M 42mm (Sedna gold, rubber) justifies its premium with Swiss Made heritage and Automatic, Omega Co-Axial Master Chronometer Calibre 8800. Both represent excellent choices in the luxury watch category.
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Specifications Compared
| Feature | Omega Seamaster Diver 300M 42mm (Sedna gold, rubber) | Orient Mako 40 Green |
|---|---|---|
| Price | $25,000+ | $250–$500 |
| Case Size | 42mm | 40mm |
| Movement | Automatic, Omega Co-Axial Master Chronometer Calibre 8800 | Automatic Caliber F6722 |
| Caliber Type | Omega 8800, METAS Master Chronometer, silicon balance spring | Orient In-House Automatic (Hacking, Hand-Winding) |
| Power Reserve | About 55 hours | 40 Hours |
| Water Resistance | 300m (30 ATM), helium escape valve | 200m (20 ATM) |
| Crystal | Sapphire Crystal, sapphire caseback | Sapphire Crystal |
| Case Material | 18k Sedna gold | Stainless Steel |
| Origin | Swiss Made | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Omega's design language vs Orient's approach
The Omega Seamaster Diver 300M 42mm (Sedna gold, rubber) features a 18k Sedna gold case at 42mm with Sapphire Crystal, sapphire caseback protection. The Orient Mako 40 Green offers Stainless Steel construction at 40mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic, Omega Co-Axial Master Chronometer Calibre 8800 vs Automatic Caliber F6722
The Seamaster Diver 300M 42mm (Sedna gold, rubber) runs the Automatic, Omega Co-Axial Master Chronometer Calibre 8800 (Omega 8800, METAS Master Chronometer, silicon balance spring, About 55 hours power reserve) at standard frequency. The Mako 40 Green uses the Automatic Caliber F6722 (Orient In-House Automatic (Hacking, Hand-Winding), 40 Hours reserve) at 21,600 vph (3 Hz). The Seamaster Diver 300M 42mm (Sedna gold, rubber) edges ahead on power reserve.
Wearability & Fit
42mm vs 40mm — different wrist presence
At 42mm, the Seamaster Diver 300M 42mm (Sedna gold, rubber) has a bolder wrist presence compared to the Mako 40 Green at 40mm. Water resistance differs: 300m (30 ATM), helium escape valve vs 200m (20 ATM).
Value & Cost of Ownership
Orient sits in the lower tier
The Omega Seamaster Diver 300M 42mm (Sedna gold, rubber) sits at $25,000+ and the Orient Mako 40 Green at $250–$500. On the specs that outlast any price: the Seamaster Diver 300M 42mm (Sedna gold, rubber) uses Sapphire Crystal, sapphire caseback with About 55 hours, against Sapphire Crystal and 40 Hours on the Mako 40 Green. Service intervals are typically 5-7 years for both.
Water Resistance
300m (30 ATM), helium escape valve vs 200m (20 ATM)
The Seamaster Diver 300M 42mm (Sedna gold, rubber) is rated to 300m (30 ATM), helium escape valve while the Mako 40 Green handles 200m (20 ATM). The Seamaster Diver 300M 42mm (Sedna gold, rubber) is better suited for water activities.
Our Verdict
Omega
Seamaster Diver 300M 42mm (Sedna gold, rubber)
Choose the Omega Seamaster Diver 300M 42mm (Sedna gold, rubber) if you prioritize Omega 8800, METAS Master Chronometer, silicon balance spring engineering, Swiss Made craftsmanship, and 300m (30 ATM), helium escape valve water resistance. At $25,000+, it delivers Automatic, Omega Co-Axial Master Chronometer Calibre 8800 with About 55 hours power reserve.
Check Price on AmazonOrient
Mako 40 Green
Choose the Orient Mako 40 Green if you value Orient In-House Automatic (Hacking, Hand-Winding) technology, Made in Japan heritage, and 40mm proportions. At $250–$500, the Automatic Caliber F6722 with 40 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Omega Seamaster Diver 300M 42mm (Sedna gold, rubber) and Orient Mako 40 Green represent two distinct approaches to fine watchmaking — the Omega bringing Swiss Made tradition while Orient delivers Made in Japan engineering.
Frequently Asked Questions
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How This Page Was Made
Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.