Orient Bambino Open Heart vs Orient Mako 40 Green
Orient's timepiece meets Orient's diver
Quick Verdict
The Orient Bambino Open Heart ($250–$500) and Orient Mako 40 Green ($250–$500) are closely matched timepieces at similar price points. The Bambino Open Heart emphasizes Orient In-House Automatic, hand-winding and hacking engineering while the Mako 40 Green focuses on Made in Japan craftsmanship.
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Specifications Compared
| Feature | Orient Bambino Open Heart | Orient Mako 40 Green |
|---|---|---|
| Price | $250–$500 | $250–$500 |
| Case Size | 40.5mm | 40mm |
| Movement | Automatic Caliber F6T22 | Automatic Caliber F6722 |
| Caliber Type | Orient In-House Automatic, hand-winding and hacking | Orient In-House Automatic (Hacking, Hand-Winding) |
| Power Reserve | 40 Hours | 40 Hours |
| Water Resistance | 30m (3 ATM) | 200m (20 ATM) |
| Crystal | Domed Mineral Crystal | Sapphire Crystal |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Japanese Movement | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Orient's design language vs Orient's approach
The Orient Bambino Open Heart features a Stainless Steel case at 40.5mm with Domed Mineral Crystal 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 Caliber F6T22 vs Automatic Caliber F6722
The Bambino Open Heart runs the Automatic Caliber F6T22 (Orient In-House Automatic, hand-winding and hacking, 40 Hours power reserve) at 21,600 vph (3 Hz) 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). Power reserves are closely matched.
Wearability & Fit
40.5mm vs 40mm — different wrist presence
At 40.5mm, the Bambino Open Heart has a bolder wrist presence compared to the Mako 40 Green at 40mm. Water resistance differs: 30m (3 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Same tier — different value propositions
The Orient Bambino Open Heart sits at $250–$500 and the Orient Mako 40 Green at $250–$500. On the specs that outlast any price: the Bambino Open Heart uses Domed Mineral Crystal with 40 Hours, against Sapphire Crystal and 40 Hours on the Mako 40 Green. Service intervals are typically 5-7 years for both.
Water Resistance
30m (3 ATM) vs 200m (20 ATM)
The Bambino Open Heart is rated to 30m (3 ATM) while the Mako 40 Green handles 200m (20 ATM). The Mako 40 Green offers superior water resistance.
Our Verdict
Orient
Bambino Open Heart
Choose the Orient Bambino Open Heart if you prioritize Orient In-House Automatic, hand-winding and hacking engineering, Japanese Movement craftsmanship, and 30m (3 ATM) water resistance. At $250–$500, it delivers Automatic Caliber F6T22 with 40 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 Orient Bambino Open Heart and Orient Mako 40 Green represent two distinct approaches to fine watchmaking — the Orient bringing Japanese Movement 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.