Seiko Prospex "Turtle" vs Tissot PRX Powermatic 80 35mm
Seiko's diver meets Tissot's timepiece
Quick Verdict
The Seiko Prospex "Turtle" ($500–$1,000) and Tissot PRX Powermatic 80 35mm ($500–$1,000) are closely matched timepieces at similar price points. The Prospex "Turtle" emphasizes In-House Automatic Manufacture engineering while the PRX Powermatic 80 35mm focuses on Swiss Made craftsmanship.
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Specifications Compared
| Feature | Seiko Prospex "Turtle" | Tissot PRX Powermatic 80 35mm |
|---|---|---|
| Price | $500–$1,000 | $500–$1,000 |
| Case Size | 45mm | 35mm |
| Movement | Automatic Caliber 4R36 | Automatic Powermatic 80 (Caliber 80.111) |
| Caliber Type | In-House Automatic Manufacture | ETA/Tissot Automatic |
| Power Reserve | 41 Hours | 80 Hours |
| Water Resistance | 200m (20 ATM) Diver | 100m (10 ATM) |
| Crystal | Sapphire Crystal | Sapphire Crystal |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Made in Japan | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Seiko's design language vs Tissot's approach
The Seiko Prospex "Turtle" features a Stainless Steel case at 45mm with Sapphire Crystal protection. The Tissot PRX Powermatic 80 35mm offers Stainless Steel construction at 35mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Caliber 4R36 vs Automatic Powermatic 80 (Caliber 80.111)
The Prospex "Turtle" runs the Automatic Caliber 4R36 (In-House Automatic Manufacture, 41 Hours power reserve) at 21,600 vph (3 Hz) frequency. The PRX Powermatic 80 35mm uses the Automatic Powermatic 80 (Caliber 80.111) (ETA/Tissot Automatic, 80 Hours reserve) at 21,600 vph (3 Hz). The PRX Powermatic 80 35mm offers a longer power reserve.
Wearability & Fit
45mm vs 35mm — different wrist presence
At 45mm, the Prospex "Turtle" has a bolder wrist presence compared to the PRX Powermatic 80 35mm at 35mm. Water resistance differs: 200m (20 ATM) Diver vs 100m (10 ATM).
Value & Cost of Ownership
Same tier — different value propositions
The Seiko Prospex "Turtle" sits at $500–$1,000 and the Tissot PRX Powermatic 80 35mm at $500–$1,000. On the specs that outlast any price: the Prospex "Turtle" uses Sapphire Crystal with 41 Hours, against Sapphire Crystal and 80 Hours on the PRX Powermatic 80 35mm. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) Diver vs 100m (10 ATM)
The Prospex "Turtle" is rated to 200m (20 ATM) Diver while the PRX Powermatic 80 35mm handles 100m (10 ATM). The Prospex "Turtle" is better suited for water activities.
Our Verdict
Seiko
Prospex "Turtle"
Choose the Seiko Prospex "Turtle" if you prioritize In-House Automatic Manufacture engineering, Made in Japan craftsmanship, and 200m (20 ATM) Diver water resistance. At $500–$1,000, it delivers Automatic Caliber 4R36 with 41 Hours power reserve.
Check Price on AmazonTissot
PRX Powermatic 80 35mm
Choose the Tissot PRX Powermatic 80 35mm if you value ETA/Tissot Automatic technology, Swiss Made heritage, and 35mm proportions. At $500–$1,000, the Automatic Powermatic 80 (Caliber 80.111) with 80 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Seiko Prospex "Turtle" and Tissot PRX Powermatic 80 35mm represent two distinct approaches to fine watchmaking — the Seiko bringing Made in Japan tradition while Tissot delivers Swiss Made 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.