Invicta Pro Diver Automatic 23681 vs Seiko Prospex Alpinist
Two divers compared — $50–$100 vs $500–$1,000
Quick Verdict
The Invicta Pro Diver Automatic 23681 ($50–$100) offers Automatic (Seiko NH35A) precision in the tier below the Seiko Prospex Alpinist ($500–$1,000). The Pro Diver Automatic 23681 measures 40mm and is rated 200m. The Prospex Alpinist counters with Made in Japan craftsmanship and 200m (20 ATM) water resistance. Both are exceptional divers for their respective tiers.
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Specifications Compared
| Feature | Invicta Pro Diver Automatic 23681 | Seiko Prospex Alpinist |
|---|---|---|
| Price | $50–$100 | $500–$1,000 |
| Case Size | 40mm | 39.5mm |
| Movement | Automatic NH35A | Automatic Caliber 6R35 |
| Caliber Type | Automatic (Seiko NH35A) | In-House Automatic Manufacture |
| Power Reserve | — | 70 Hours |
| Water Resistance | 200m | 200m (20 ATM) |
| Crystal | Mineral Glass | Sapphire with Cyclops |
| 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 Prospex Alpinist offers Stainless Steel construction at 39.5mm with Sapphire with Cyclops. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic NH35A vs Automatic Caliber 6R35
The Pro Diver Automatic 23681 runs the Automatic NH35A (Automatic (Seiko NH35A), standard power reserve) at standard frequency. The Prospex Alpinist uses the Automatic Caliber 6R35 (In-House Automatic Manufacture, 70 Hours reserve) at 21,600 vph (3 Hz). The Prospex Alpinist offers a longer power reserve.
Wearability & Fit
40mm vs 39.5mm — different wrist presence
At 40mm, the Pro Diver Automatic 23681 has a bolder wrist presence compared to the Prospex Alpinist at 39.5mm. Water resistance differs: 200m vs 200m (20 ATM).
Value & Cost of Ownership
Invicta sits in the lower tier
The Invicta Pro Diver Automatic 23681 sits at $50–$100 and the Seiko Prospex Alpinist at $500–$1,000. On the specs that outlast any price: the Pro Diver Automatic 23681 uses Mineral Glass with a standard reserve, against Sapphire with Cyclops and 70 Hours on the Prospex Alpinist. Service intervals are typically 5-7 years for both.
Water Resistance
200m vs 200m (20 ATM)
The Pro Diver Automatic 23681 is rated to 200m while the Prospex Alpinist 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.
Check Price on AmazonSeiko
Prospex Alpinist
Choose the Seiko Prospex Alpinist if you value In-House Automatic Manufacture technology, Made in Japan heritage, and 39.5mm proportions. At $500–$1,000, the Automatic Caliber 6R35 with 70 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Invicta Pro Diver Automatic 23681 and Seiko Prospex Alpinist represent two distinct approaches to the diver category — 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.