Head-to-Head Comparison

Updated September 5, 2026

Grand Seiko Godzilla 65th Anniversary SBGA405 vs Oris Aquis Date Calibre 400

Two divers compared — $25,000+ vs $2,500–$5,000

Quick Verdict

The Oris Aquis Date Calibre 400 ($2,500–$5,000) delivers Oris In-House Manufacture technology in the tier below the Grand Seiko Godzilla 65th Anniversary SBGA405 ($25,000+). The Aquis Date Calibre 400 measures 41.5mm and is rated 300m (30 ATM). The Godzilla 65th Anniversary SBGA405 justifies its premium with Made in Japan heritage and Spring Drive 9R15. Both represent excellent choices in the diver category.

Grand SeikoGodzilla 65th Anniversary SBGA405$25,000+ Check price View the dossier

Transparency — We earn a small commission on purchases made through our Amazon links. This doesn't affect our editorial independence.

Grand Seiko

Godzilla 65th Anniversary SBGA405

$25,000+

Check Price Full Review

Oris

Aquis Date Calibre 400

$2,500–$5,000

View the dossier Full Review

Specifications Compared

Feature	Grand Seiko Godzilla 65th Anniversary SBGA405	Oris Aquis Date Calibre 400
Price	$25,000+	$2,500–$5,000
Case Size	44.5mm	41.5mm
Movement	Spring Drive 9R15	Automatic Calibre 400
Caliber Type	Grand Seiko Spring Drive 9R15, rated +/-10 seconds per month	Oris In-House Manufacture
Power Reserve	About 72 hours	120 Hours (5 Days)
Water Resistance	200m (20 ATM)	300m (30 ATM)
Crystal	Sapphire Crystal	Sapphire Crystal with Anti-Reflective Coating
Case Material	High-intensity titanium	Stainless Steel
Origin	Made in Japan	Swiss Made

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Grand Seiko's design language vs Oris's approach

The Grand Seiko Godzilla 65th Anniversary SBGA405 features a High-intensity titanium case at 44.5mm with Sapphire Crystal protection. The Oris Aquis Date Calibre 400 offers Stainless Steel construction at 41.5mm with Sapphire Crystal with Anti-Reflective Coating. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Oris

Spring Drive 9R15 vs Automatic Calibre 400

The Godzilla 65th Anniversary SBGA405 runs the Spring Drive 9R15 (Grand Seiko Spring Drive 9R15, rated +/-10 seconds per month, About 72 hours power reserve) at standard frequency. The Aquis Date Calibre 400 uses the Automatic Calibre 400 (Oris In-House Manufacture, 120 Hours (5 Days) reserve) at 28,800 vph (4 Hz). The Aquis Date Calibre 400 offers a longer power reserve.

📏

Wearability & Fit

Edge: Oris

44.5mm vs 41.5mm — different wrist presence

At 44.5mm, the Godzilla 65th Anniversary SBGA405 has a bolder wrist presence compared to the Aquis Date Calibre 400 at 41.5mm. Water resistance differs: 200m (20 ATM) vs 300m (30 ATM).

💰

Value & Cost of Ownership

Edge: Oris

Oris sits in the lower tier

The Grand Seiko Godzilla 65th Anniversary SBGA405 sits at $25,000+ and the Oris Aquis Date Calibre 400 at $2,500–$5,000. On the specs that outlast any price: the Godzilla 65th Anniversary SBGA405 uses Sapphire Crystal with About 72 hours, against Sapphire Crystal with Anti-Reflective Coating and 120 Hours (5 Days) on the Aquis Date Calibre 400. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Oris

200m (20 ATM) vs 300m (30 ATM)

The Godzilla 65th Anniversary SBGA405 is rated to 200m (20 ATM) while the Aquis Date Calibre 400 handles 300m (30 ATM). The Aquis Date Calibre 400 offers superior water resistance.

Our Verdict

Grand Seiko

Godzilla 65th Anniversary SBGA405

Choose the Grand Seiko Godzilla 65th Anniversary SBGA405 if you prioritize Grand Seiko Spring Drive 9R15, rated +/-10 seconds per month engineering, Made in Japan craftsmanship, and 200m (20 ATM) water resistance. At $25,000+, it delivers Spring Drive 9R15 with About 72 hours power reserve.

Check Price on Amazon

Oris

Aquis Date Calibre 400

Choose the Oris Aquis Date Calibre 400 if you value Oris In-House Manufacture technology, Swiss Made heritage, and 41.5mm proportions. At $2,500–$5,000, the Automatic Calibre 400 with 120 Hours (5 Days) power reserve makes it a compelling choice.

View the dossier

Try Prime Free — Free Shipping on Both Watches Students & 18–24: start Prime for Young Adults free

The Bottom Line

The Grand Seiko Godzilla 65th Anniversary SBGA405 and Oris Aquis Date Calibre 400 represent two distinct approaches to the diver category — the Grand Seiko bringing Made in Japan tradition while Oris delivers Swiss Made engineering.

Frequently Asked Questions

The Oris Aquis Date Calibre 400 is the better buy if you want a mechanical movement; the Grand Seiko Godzilla 65th Anniversary SBGA405 is the better buy if you want quartz accuracy with no servicing. On price, the Oris Aquis Date Calibre 400 sits a band lower ($2,500–$5,000 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 Oris Aquis Date Calibre 400 offers better upfront value, sitting a tier lower at $2,500–$5,000. However, the Grand Seiko Godzilla 65th Anniversary SBGA405 may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Godzilla 65th Anniversary SBGA405 at 44.5mm with 200m (20 ATM) water resistance handles everyday situations. The Aquis Date Calibre 400 at 41.5mm with 300m (30 ATM) is similarly capable. The Godzilla 65th Anniversary SBGA405 uses Sapphire Crystal while the Aquis Date Calibre 400 uses Sapphire Crystal with Anti-Reflective Coating.

More Comparisons

Oris Aquis vs Seiko SPB143 (62MAS)

Swiss independence meets Japanese precision diving

Tag Heuer Carrera Chronograph vs Grand Seiko Godzilla 65th Anniversary SBGA405

Tag Heuer's chronograph meets Grand Seiko's diver

Tag Heuer Carrera Chronograph vs Oris Aquis Date Calibre 400

Tag Heuer's chronograph meets Oris's diver

Explore These Watches

Grand Seiko Godzilla 65th Anniversary SBGA405 — Full Review Oris Aquis Date Calibre 400 — Full Review Browse All Guides

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.