Head-to-Head Comparison

Updated September 5, 2026

Invicta Pro Diver Automatic 23681 vs Tudor Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet)

Two divers compared — $50–$100 vs $2,500–$5,000

Quick Verdict

The Invicta Pro Diver Automatic 23681 ($50–$100) offers Automatic (Seiko NH35A) precision in the tier below the Tudor Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) ($2,500–$5,000). The Pro Diver Automatic 23681 measures 40mm and is rated 200m. The Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) counters with Swiss Made craftsmanship and 200m (20 ATM) water resistance. Both are exceptional divers for their respective tiers.

InvictaPro Diver Automatic 23681$50–$100 Check price TudorBlack Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet)$2,500–$5,000 Check price

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Invicta

Pro Diver Automatic 23681

$50–$100

Check Price Full Review

Tudor

Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet)

$2,500–$5,000

Check Price Full Review

Specifications Compared

Feature	Invicta Pro Diver Automatic 23681	Tudor Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet)
Price	$50–$100	$2,500–$5,000
Case Size	40mm	39mm, 11.9mm thick, 20mm lugs
Movement	Automatic NH35A	Tudor manufacture calibre MT5402, automatic, COSC chronometer, bidirectional rotor
Caliber Type	Automatic (Seiko NH35A)	Tudor manufacture MT5402, COSC
Power Reserve	—	About 70 hours
Water Resistance	200m	200m (20 ATM)
Crystal	Mineral Glass	Domed sapphire
Case Material	—	Stainless steel, polished and satin; unidirectional bezel with navy blue anodised aluminium insert; screw-down crown
Origin	Invicta (Japanese movement)	Swiss Made

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Invicta's design language vs Tudor's approach

The Invicta Pro Diver Automatic 23681 features a steel case at 40mm with Mineral Glass protection. The Tudor Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) offers Stainless steel, polished and satin; unidirectional bezel with navy blue anodised aluminium insert; screw-down crown construction at 39mm, 11.9mm thick, 20mm lugs with Domed sapphire. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Tudor

Automatic NH35A vs Tudor manufacture calibre MT5402, automatic, COSC chronometer, bidirectional rotor

The Pro Diver Automatic 23681 runs the Automatic NH35A (Automatic (Seiko NH35A), standard power reserve) at standard frequency. The Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) uses the Tudor manufacture calibre MT5402, automatic, COSC chronometer, bidirectional rotor (Tudor manufacture MT5402, COSC, About 70 hours reserve) at standard. The Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) offers a longer power reserve.

📏

Wearability & Fit

Edge: Tudor

40mm vs 39mm, 11.9mm thick, 20mm lugs — different wrist presence

At 40mm, the Pro Diver Automatic 23681 has a bolder wrist presence compared to the Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) at 39mm, 11.9mm thick, 20mm lugs. Water resistance differs: 200m vs 200m (20 ATM).

💰

Value & Cost of Ownership

Edge: Invicta

Invicta sits in the lower tier

The Invicta Pro Diver Automatic 23681 sits at $50–$100 and the Tudor Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) at $2,500–$5,000. On the specs that outlast any price: the Pro Diver Automatic 23681 uses Mineral Glass with a standard reserve, against Domed sapphire and About 70 hours on the Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet). Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Draw

200m vs 200m (20 ATM)

The Pro Diver Automatic 23681 is rated to 200m while the Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) handles 200m (20 ATM). Both offer identical water resistance ratings.

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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Tudor

Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet)

Choose the Tudor Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) if you value Tudor manufacture MT5402, COSC technology, Swiss Made heritage, and 39mm, 11.9mm thick, 20mm lugs proportions. At $2,500–$5,000, the Tudor manufacture calibre MT5402, automatic, COSC chronometer, bidirectional rotor with About 70 hours power reserve makes it a compelling choice.

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The Bottom Line

The Invicta Pro Diver Automatic 23681 and Tudor Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) represent two distinct approaches to the diver category — the Invicta bringing Invicta (Japanese movement) tradition while Tudor delivers Swiss Made engineering.

Frequently Asked Questions

On price, the Invicta Pro Diver Automatic 23681 sits a band lower ($50–$100 against $2,500–$5,000), 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 Tudor Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) 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 Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) at 39mm, 11.9mm thick, 20mm lugs with 200m (20 ATM) is similarly capable. The Pro Diver Automatic 23681 uses Mineral Glass while the Black Bay Fifty-Eight 39mm M79030B-0001 (steel, navy blue bezel and dial, riveted steel bracelet) uses Domed sapphire. Sapphire resists scratches noticeably better than mineral glass.

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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.