Maurice Lacroix Aikon Automatic vs Seiko Prospex Alpinist
Two divers compared — $1,500–$2,500 vs $500–$1,000
Quick Verdict
The Seiko Prospex Alpinist ($500–$1,000) delivers In-House Automatic Manufacture technology in the tier below the Maurice Lacroix Aikon Automatic ($1,500–$2,500). The Prospex Alpinist measures 39.5mm and is rated 200m (20 ATM). The Aikon Automatic justifies its premium with Swiss Made heritage and Automatic ML115. Both represent excellent choices in the diver category.
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Specifications Compared
| Feature | Maurice Lacroix Aikon Automatic | Seiko Prospex Alpinist |
|---|---|---|
| Price | $1,500–$2,500 | $500–$1,000 |
| Case Size | 42mm | 39.5mm |
| Movement | Automatic ML115 | Automatic Caliber 6R35 |
| Caliber Type | Automatic (Sellita SW200-1 base) | In-House Automatic Manufacture |
| Power Reserve | 38 Hours | 70 Hours |
| Water Resistance | 200m (20 ATM) | 200m (20 ATM) |
| Crystal | Sapphire Crystal | Sapphire with Cyclops |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Maurice Lacroix's design language vs Seiko's approach
The Maurice Lacroix Aikon Automatic features a Stainless Steel case at 42mm with Sapphire Crystal 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 ML115 vs Automatic Caliber 6R35
The Aikon Automatic runs the Automatic ML115 (Automatic (Sellita SW200-1 base), 38 Hours power reserve) at 28,800 vph (4 Hz) 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
42mm vs 39.5mm — different wrist presence
At 42mm, the Aikon Automatic has a bolder wrist presence compared to the Prospex Alpinist at 39.5mm. Water resistance differs: 200m (20 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Seiko sits in the lower tier
The Maurice Lacroix Aikon Automatic sits at $1,500–$2,500 and the Seiko Prospex Alpinist at $500–$1,000. On the specs that outlast any price: the Aikon Automatic uses Sapphire Crystal with 38 Hours, against Sapphire with Cyclops and 70 Hours on the Prospex Alpinist. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 200m (20 ATM)
The Aikon Automatic is rated to 200m (20 ATM) while the Prospex Alpinist handles 200m (20 ATM). Both offer identical water resistance ratings.
Our Verdict
Maurice Lacroix
Aikon Automatic
Choose the Maurice Lacroix Aikon Automatic if you prioritize Automatic (Sellita SW200-1 base) engineering, Swiss Made craftsmanship, and 200m (20 ATM) water resistance. At $1,500–$2,500, it delivers Automatic ML115 with 38 Hours 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 Maurice Lacroix Aikon Automatic and Seiko Prospex Alpinist represent two distinct approaches to the diver category — the Maurice Lacroix bringing Swiss Made 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.