Head-to-Head Comparison

Updated September 5, 2026

Breguet Marine 5517 (18k rose gold, wave dial) vs Seiko Presage SSA425 Open Heart

Two timepieces compared — $25,000+ vs $250–$500

Quick Verdict

The Seiko Presage SSA425 Open Heart ($250–$500) delivers Seiko In-House Automatic technology in the tier below the Breguet Marine 5517 (18k rose gold, wave dial) ($25,000+). The Presage SSA425 Open Heart measures 40.5mm and is rated 50m (5 ATM). The Marine 5517 (18k rose gold, wave dial) justifies its premium with Swiss Made heritage and Automatic, Breguet Calibre 777A. Both represent excellent choices in the timepiece category.

BreguetMarine 5517 (18k rose gold, wave dial)$25,000+ Check price SeikoPresage SSA425 Open Heart$250–$500 Check price

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Breguet

Marine 5517 (18k rose gold, wave dial)

$25,000+

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Seiko

Presage SSA425 Open Heart

$250–$500

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Specifications Compared

Feature	Breguet Marine 5517 (18k rose gold, wave dial)	Seiko Presage SSA425 Open Heart
Price	$25,000+	$250–$500
Case Size	40mm	40.5mm
Movement	Automatic, Breguet Calibre 777A	Automatic Caliber 4R38
Caliber Type	Breguet 777A, silicon escapement and balance spring	Seiko In-House Automatic
Power Reserve	About 55 hours	41 Hours
Water Resistance	100m (10 ATM)	50m (5 ATM)
Crystal	Sapphire Crystal, sapphire caseback	Hardlex Crystal
Case Material	18k rose gold, fluted caseband	Stainless Steel
Origin	Swiss Made	Made in Japan

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Breguet's design language vs Seiko's approach

The Breguet Marine 5517 (18k rose gold, wave dial) features a 18k rose gold, fluted caseband case at 40mm with Sapphire Crystal, sapphire caseback protection. The Seiko Presage SSA425 Open Heart offers Stainless Steel construction at 40.5mm with Hardlex Crystal. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Breguet

Automatic, Breguet Calibre 777A vs Automatic Caliber 4R38

The Marine 5517 (18k rose gold, wave dial) runs the Automatic, Breguet Calibre 777A (Breguet 777A, silicon escapement and balance spring, About 55 hours power reserve) at standard frequency. The Presage SSA425 Open Heart uses the Automatic Caliber 4R38 (Seiko In-House Automatic, 41 Hours reserve) at 21,600 vph (3 Hz). The Marine 5517 (18k rose gold, wave dial) edges ahead on power reserve.

📏

Wearability & Fit

Edge: Breguet

40mm vs 40.5mm — different wrist presence

At 40mm, the Marine 5517 (18k rose gold, wave dial) wears more compactly on smaller wrists compared to the Presage SSA425 Open Heart at 40.5mm. Water resistance differs: 100m (10 ATM) vs 50m (5 ATM).

💰

Value & Cost of Ownership

Edge: Seiko

Seiko sits in the lower tier

The Breguet Marine 5517 (18k rose gold, wave dial) sits at $25,000+ and the Seiko Presage SSA425 Open Heart at $250–$500. On the specs that outlast any price: the Marine 5517 (18k rose gold, wave dial) uses Sapphire Crystal, sapphire caseback with About 55 hours, against Hardlex Crystal and 41 Hours on the Presage SSA425 Open Heart. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Breguet

100m (10 ATM) vs 50m (5 ATM)

The Marine 5517 (18k rose gold, wave dial) is rated to 100m (10 ATM) while the Presage SSA425 Open Heart handles 50m (5 ATM). The Marine 5517 (18k rose gold, wave dial) is better suited for water activities.

Our Verdict

Breguet

Marine 5517 (18k rose gold, wave dial)

Choose the Breguet Marine 5517 (18k rose gold, wave dial) if you prioritize Breguet 777A, silicon escapement and balance spring engineering, Swiss Made craftsmanship, and 100m (10 ATM) water resistance. At $25,000+, it delivers Automatic, Breguet Calibre 777A with About 55 hours power reserve.

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Seiko

Presage SSA425 Open Heart

Choose the Seiko Presage SSA425 Open Heart if you value Seiko In-House Automatic technology, Made in Japan heritage, and 40.5mm proportions. At $250–$500, the Automatic Caliber 4R38 with 41 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Breguet Marine 5517 (18k rose gold, wave dial) and Seiko Presage SSA425 Open Heart represent two distinct approaches to the timepiece category — the Breguet bringing Swiss Made tradition while Seiko delivers Made in Japan engineering.

Frequently Asked Questions

For water, the Breguet Marine 5517 (18k rose gold, wave dial) is rated 100 m against 50 m, which is the difference between swimming and diving on one side and splashes on the other. On price, the Seiko Presage SSA425 Open Heart sits a band lower ($250–$500 against $25,000+), 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 Seiko Presage SSA425 Open Heart offers better upfront value, sitting a tier lower at $250–$500. However, the Breguet Marine 5517 (18k rose gold, wave dial) may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Marine 5517 (18k rose gold, wave dial) at 40mm with 100m (10 ATM) water resistance handles everyday situations. The Presage SSA425 Open Heart at 40.5mm with 50m (5 ATM) is similarly capable. The Marine 5517 (18k rose gold, wave dial) uses Sapphire Crystal, sapphire caseback while the Presage SSA425 Open Heart uses Hardlex 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.