Head-to-Head Comparison

Updated September 5, 2026

Invicta Pro Diver Automatic 23681 vs Orient Bambino Open Heart

Invicta's diver meets Orient's timepiece

Quick Verdict

The Invicta Pro Diver Automatic 23681 ($50–$100) offers Automatic (Seiko NH35A) precision in the tier below the Orient Bambino Open Heart ($250–$500). The Pro Diver Automatic 23681 measures 40mm and is rated 200m. The Bambino Open Heart counters with Japanese Movement craftsmanship and 30m (3 ATM) water resistance. Both are exceptional watches for their respective tiers.

InvictaPro Diver Automatic 23681$50–$100 Check price View the dossier

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Invicta

Pro Diver Automatic 23681

$50–$100

Check Price Full Review

Orient

Bambino Open Heart

$250–$500

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Specifications Compared

Feature	Invicta Pro Diver Automatic 23681	Orient Bambino Open Heart
Price	$50–$100	$250–$500
Case Size	40mm	40.5mm
Movement	Automatic NH35A	Automatic Caliber F6T22
Caliber Type	Automatic (Seiko NH35A)	Orient In-House Automatic, hand-winding and hacking
Power Reserve	—	40 Hours
Water Resistance	200m	30m (3 ATM)
Crystal	Mineral Glass	Domed Mineral Crystal
Case Material	—	Stainless Steel
Origin	Invicta (Japanese movement)	Japanese Movement

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Invicta's design language vs Orient's approach

The Invicta Pro Diver Automatic 23681 features a steel case at 40mm 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.

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Movement & Performance

Edge: Orient

Automatic NH35A vs Automatic Caliber F6T22

The Pro Diver Automatic 23681 runs the Automatic NH35A (Automatic (Seiko NH35A), standard 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: Invicta

40mm vs 40.5mm — different wrist presence

At 40mm, the Pro Diver Automatic 23681 wears more compactly on smaller wrists compared to the Bambino Open Heart at 40.5mm. Water resistance differs: 200m vs 30m (3 ATM).

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Value & Cost of Ownership

Edge: Invicta

Invicta sits in the lower tier

The Invicta Pro Diver Automatic 23681 sits at $50–$100 and the Orient Bambino Open Heart at $250–$500. On the specs that outlast any price: the Pro Diver Automatic 23681 uses Mineral Glass with a standard reserve, 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: Invicta

200m vs 30m (3 ATM)

The Pro Diver Automatic 23681 is rated to 200m while the Bambino Open Heart handles 30m (3 ATM). The Pro Diver Automatic 23681 is better suited for water activities.

Our Verdict

Invicta

Pro Diver Automatic 23681

Choose the Invicta Pro Diver Automatic 23681 if you prioritize Automatic (Seiko NH35A) engineering, Invicta (Japanese movement) craftsmanship, and 200m water resistance. At $50–$100, it delivers Automatic NH35A with solid 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 Invicta Pro Diver Automatic 23681 and Orient Bambino Open Heart represent two distinct approaches to fine watchmaking — the Invicta bringing Invicta (Japanese movement) tradition while Orient delivers Japanese Movement engineering.

Frequently Asked Questions

For water, the Invicta Pro Diver Automatic 23681 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 Invicta Pro Diver Automatic 23681 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 Invicta Pro Diver Automatic 23681 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 Pro Diver Automatic 23681 at 40mm with 200m water resistance handles everyday situations. The Bambino Open Heart at 40.5mm with 30m (3 ATM) is similarly capable. The Pro Diver Automatic 23681 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.