Oris Aquis Date Calibre 400 vs Seiko Chronograph SSB427 "Blue Panda"
Oris's diver meets Seiko's chronograph
Quick Verdict
The Seiko Chronograph SSB427 "Blue Panda" ($150–$250) delivers Seiko Quartz Chronograph (Battery) technology in the tier below the Oris Aquis Date Calibre 400 ($2,500–$5,000). The Chronograph SSB427 "Blue Panda" measures 41mm and is rated 100m (10 ATM). The Aquis Date Calibre 400 justifies its premium with Swiss Made heritage and Automatic Calibre 400. Both represent excellent choices in the luxury watch category.
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Specifications Compared
| Feature | Oris Aquis Date Calibre 400 | Seiko Chronograph SSB427 "Blue Panda" |
|---|---|---|
| Price | $2,500–$5,000 | $150–$250 |
| Case Size | 41.5mm | 41mm |
| Movement | Automatic Calibre 400 | Quartz Chronograph Caliber 8T63 |
| Caliber Type | Oris In-House Manufacture | Seiko Quartz Chronograph (Battery) |
| Power Reserve | 120 Hours (5 Days) | 3-Year Battery |
| Water Resistance | 300m (30 ATM) | 100m (10 ATM) |
| Crystal | Sapphire Crystal with Anti-Reflective Coating | Hardlex Mineral Glass |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Seiko (Japan) |
Category-by-Category Analysis
Design & Aesthetics
Oris's design language vs Seiko's approach
The Oris Aquis Date Calibre 400 features a Stainless Steel case at 41.5mm with Sapphire Crystal with Anti-Reflective Coating protection. The Seiko Chronograph SSB427 "Blue Panda" offers Stainless Steel construction at 41mm with Hardlex Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Calibre 400 vs Quartz Chronograph Caliber 8T63
The Aquis Date Calibre 400 runs the Automatic Calibre 400 (Oris In-House Manufacture, 120 Hours (5 Days) power reserve) at 28,800 vph (4 Hz) frequency. The Chronograph SSB427 "Blue Panda" uses the Quartz Chronograph Caliber 8T63 (Seiko Quartz Chronograph (Battery), 3-Year Battery reserve) at standard. The Aquis Date Calibre 400 edges ahead on power reserve.
Wearability & Fit
41.5mm vs 41mm — different wrist presence
At 41.5mm, the Aquis Date Calibre 400 has a bolder wrist presence compared to the Chronograph SSB427 "Blue Panda" at 41mm. Water resistance differs: 300m (30 ATM) vs 100m (10 ATM).
Value & Cost of Ownership
Seiko sits in the lower tier
The Oris Aquis Date Calibre 400 sits at $2,500–$5,000 and the Seiko Chronograph SSB427 "Blue Panda" at $150–$250. On the specs that outlast any price: the Aquis Date Calibre 400 uses Sapphire Crystal with Anti-Reflective Coating with 120 Hours (5 Days), against Hardlex Mineral Glass and 3-Year Battery on the Chronograph SSB427 "Blue Panda". Service intervals are typically 5-7 years for both.
Water Resistance
300m (30 ATM) vs 100m (10 ATM)
The Aquis Date Calibre 400 is rated to 300m (30 ATM) while the Chronograph SSB427 "Blue Panda" handles 100m (10 ATM). The Aquis Date Calibre 400 is better suited for water activities.
Our Verdict
Oris
Aquis Date Calibre 400
Choose the Oris Aquis Date Calibre 400 if you prioritize Oris In-House Manufacture engineering, Swiss Made craftsmanship, and 300m (30 ATM) water resistance. At $2,500–$5,000, it delivers Automatic Calibre 400 with 120 Hours (5 Days) power reserve.
Check Price on AmazonSeiko
Chronograph SSB427 "Blue Panda"
Choose the Seiko Chronograph SSB427 "Blue Panda" if you value Seiko Quartz Chronograph (Battery) technology, Seiko (Japan) heritage, and 41mm proportions. At $150–$250, the Quartz Chronograph Caliber 8T63 with 3-Year Battery power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Oris Aquis Date Calibre 400 and Seiko Chronograph SSB427 "Blue Panda" represent two distinct approaches to fine watchmaking — the Oris bringing Swiss Made tradition while Seiko delivers Seiko (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.