Invicta Pro Diver Automatic 23681 vs Seiko 5 Sports 5KX
Invicta's diver meets Seiko's timepiece
Quick Verdict
The Invicta Pro Diver Automatic 23681 ($50–$100) offers Automatic (Seiko NH35A) precision in the tier below the Seiko 5 Sports 5KX ($250–$500). The Pro Diver Automatic 23681 measures 40mm and is rated 200m. The 5 Sports 5KX counters with Made in Japan craftsmanship and 100m (10 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Specifications Compared
| Feature | Invicta Pro Diver Automatic 23681 | Seiko 5 Sports 5KX |
|---|---|---|
| Price | $50–$100 | $250–$500 |
| Case Size | 40mm | 42.5mm |
| Movement | Automatic NH35A | Automatic Caliber 4R36 |
| Caliber Type | Automatic (Seiko NH35A) | Seiko In-House Automatic |
| Power Reserve | — | 41 Hours |
| Water Resistance | 200m | 100m (10 ATM) |
| Crystal | Mineral Glass | Hardlex Crystal |
| Case Material | — | Stainless Steel |
| Origin | Invicta (Japanese movement) | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Invicta's design language vs Seiko's approach
The Invicta Pro Diver Automatic 23681 features a steel case at 40mm with Mineral Glass protection. The Seiko 5 Sports 5KX offers Stainless Steel construction at 42.5mm with Hardlex Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic NH35A vs Automatic Caliber 4R36
The Pro Diver Automatic 23681 runs the Automatic NH35A (Automatic (Seiko NH35A), standard power reserve) at standard frequency. The 5 Sports 5KX uses the Automatic Caliber 4R36 (Seiko In-House Automatic, 41 Hours reserve) at 21,600 vph (3 Hz). The 5 Sports 5KX offers a longer power reserve.
Wearability & Fit
40mm vs 42.5mm — different wrist presence
At 40mm, the Pro Diver Automatic 23681 wears more compactly on smaller wrists compared to the 5 Sports 5KX at 42.5mm. Water resistance differs: 200m vs 100m (10 ATM).
Value & Cost of Ownership
Invicta sits in the lower tier
The Invicta Pro Diver Automatic 23681 sits at $50–$100 and the Seiko 5 Sports 5KX at $250–$500. On the specs that outlast any price: the Pro Diver Automatic 23681 uses Mineral Glass with a standard reserve, against Hardlex Crystal and 41 Hours on the 5 Sports 5KX. Service intervals are typically 5-7 years for both.
Water Resistance
200m vs 100m (10 ATM)
The Pro Diver Automatic 23681 is rated to 200m while the 5 Sports 5KX handles 100m (10 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.
Check Price on AmazonSeiko
5 Sports 5KX
Choose the Seiko 5 Sports 5KX if you value Seiko In-House Automatic technology, Made in Japan heritage, and 42.5mm proportions. At $250–$500, the Automatic Caliber 4R36 with 41 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Invicta Pro Diver Automatic 23681 and Seiko 5 Sports 5KX represent two distinct approaches to fine watchmaking — the Invicta bringing Invicta (Japanese movement) tradition while Seiko 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.