Head-to-Head Comparison

Updated September 5, 2026

Casio Duro MDV106 Black vs Orient Bambino Open Heart

Casio's diver meets Orient's timepiece

Quick Verdict

The Casio Duro MDV106 Black ($50–$100) offers Casio Quartz (Battery) precision in the tier below the Orient Bambino Open Heart ($250–$500). The Duro MDV106 Black measures 44mm and is rated 200m (20 ATM) Diver. The Bambino Open Heart counters with Japanese Movement craftsmanship and 30m (3 ATM) water resistance. Both are exceptional watches for their respective tiers.

CasioDuro MDV106 Black$50–$100 Check price View the dossier

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Casio

Duro MDV106 Black

$50–$100

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Orient

Bambino Open Heart

$250–$500

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Specifications Compared

Feature	Casio Duro MDV106 Black	Orient Bambino Open Heart
Price	$50–$100	$250–$500
Case Size	44mm	40.5mm
Movement	Quartz Module 2784	Automatic Caliber F6T22
Caliber Type	Casio Quartz (Battery)	Orient In-House Automatic, hand-winding and hacking
Power Reserve	3-Year Battery	40 Hours
Water Resistance	200m (20 ATM) Diver	30m (3 ATM)
Crystal	Mineral Glass	Domed Mineral Crystal
Case Material	Stainless Steel	Stainless Steel
Origin	Casio (Japan)	Japanese Movement

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Casio's design language vs Orient's approach

The Casio Duro MDV106 Black features a Stainless Steel case at 44mm with Mineral Glass protection. The Orient Bambino Open Heart offers Stainless Steel construction at 40.5mm with Domed Mineral Crystal. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Orient

Quartz Module 2784 vs Automatic Caliber F6T22

The Duro MDV106 Black runs the Quartz Module 2784 (Casio Quartz (Battery), 3-Year Battery power reserve) at standard frequency. The Bambino Open Heart uses the Automatic Caliber F6T22 (Orient In-House Automatic, hand-winding and hacking, 40 Hours reserve) at 21,600 vph (3 Hz). The Bambino Open Heart offers a longer power reserve.

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Wearability & Fit

Edge: Orient

44mm vs 40.5mm — different wrist presence

At 44mm, the Duro MDV106 Black has a bolder wrist presence compared to the Bambino Open Heart at 40.5mm. Water resistance differs: 200m (20 ATM) Diver vs 30m (3 ATM).

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Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Casio Duro MDV106 Black sits at $50–$100 and the Orient Bambino Open Heart at $250–$500. On the specs that outlast any price: the Duro MDV106 Black uses Mineral Glass with 3-Year Battery, against Domed Mineral Crystal and 40 Hours on the Bambino Open Heart. Service intervals are typically 5-7 years for both.

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Water Resistance

Edge: Casio

200m (20 ATM) Diver vs 30m (3 ATM)

The Duro MDV106 Black is rated to 200m (20 ATM) Diver while the Bambino Open Heart handles 30m (3 ATM). The Duro MDV106 Black is better suited for water activities.

Our Verdict

Casio

Duro MDV106 Black

Choose the Casio Duro MDV106 Black if you prioritize Casio Quartz (Battery) engineering, Casio (Japan) craftsmanship, and 200m (20 ATM) Diver water resistance. At $50–$100, it delivers Quartz Module 2784 with 3-Year Battery power reserve.

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Orient

Bambino Open Heart

Choose the Orient Bambino Open Heart if you value Orient In-House Automatic, hand-winding and hacking technology, Japanese Movement heritage, and 40.5mm proportions. At $250–$500, the Automatic Caliber F6T22 with 40 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Casio Duro MDV106 Black and Orient Bambino Open Heart represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Orient delivers Japanese Movement engineering.

Frequently Asked Questions

The Orient Bambino Open Heart is the better buy if you want a mechanical movement; the Casio Duro MDV106 Black is the better buy if you want quartz accuracy with no servicing. For water, the Casio Duro MDV106 Black is rated 200 m against 30 m, which is the difference between swimming and diving on one side and splashes on the other. On price, the Casio Duro MDV106 Black sits a band lower ($50–$100 against $250–$500), so it is the cheaper way into the category. Neither is better at everything; the spec table above shows movement, case size, water resistance and crystal side by side so you can weigh what matters to you. We do not test units, so this is the makers' data, not a bench result.

The Casio Duro MDV106 Black offers better upfront value, sitting a tier lower at $50–$100. However, the Orient Bambino Open Heart may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Duro MDV106 Black at 44mm with 200m (20 ATM) Diver water resistance handles everyday situations. The Bambino Open Heart at 40.5mm with 30m (3 ATM) is similarly capable. The Duro MDV106 Black uses Mineral Glass while the Bambino Open Heart uses Domed Mineral Crystal.

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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.