Tissot PRX Powermatic 80 vs Seiko Prospex "Turtle"
Tissot's timepiece meets Seiko's diver
Quick Verdict
The Tissot PRX Powermatic 80 ($500–$1,000) and Seiko Prospex "Turtle" ($500–$1,000) are closely matched timepieces at similar price points. The PRX Powermatic 80 emphasizes In-House Automatic (ETA C07.111 base) engineering while the Prospex "Turtle" focuses on Made in Japan craftsmanship.
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Specifications Compared
| Feature | Tissot PRX Powermatic 80 | Seiko Prospex "Turtle" |
|---|---|---|
| Price | $500–$1,000 | $500–$1,000 |
| Case Size | 40mm | 45mm |
| Movement | Automatic Powermatic 80.111 | Automatic Caliber 4R36 |
| Caliber Type | In-House Automatic (ETA C07.111 base) | In-House Automatic Manufacture |
| Power Reserve | 80 Hours | 41 Hours |
| Water Resistance | 100m (10 ATM) | 200m (20 ATM) Diver |
| Crystal | Scratch-resistant Sapphire | Sapphire Crystal |
| Case Material | 316L Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Tissot's design language vs Seiko's approach
The Tissot PRX Powermatic 80 features a 316L Stainless Steel case at 40mm with Scratch-resistant Sapphire protection. The Seiko Prospex "Turtle" offers Stainless Steel construction at 45mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Powermatic 80.111 vs Automatic Caliber 4R36
The PRX Powermatic 80 runs the Automatic Powermatic 80.111 (In-House Automatic (ETA C07.111 base), 80 Hours power reserve) at 21,600 vph (3 Hz) frequency. The Prospex "Turtle" uses the Automatic Caliber 4R36 (In-House Automatic Manufacture, 41 Hours reserve) at 21,600 vph (3 Hz). The PRX Powermatic 80 edges ahead on power reserve.
Wearability & Fit
40mm vs 45mm — different wrist presence
At 40mm, the PRX Powermatic 80 wears more compactly on smaller wrists compared to the Prospex "Turtle" at 45mm. Water resistance differs: 100m (10 ATM) vs 200m (20 ATM) Diver.
Value & Cost of Ownership
Same tier — different value propositions
The Tissot PRX Powermatic 80 sits at $500–$1,000 and the Seiko Prospex "Turtle" at $500–$1,000. On the specs that outlast any price: the PRX Powermatic 80 uses Scratch-resistant Sapphire with 80 Hours, against Sapphire Crystal and 41 Hours on the Prospex "Turtle". Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 200m (20 ATM) Diver
The PRX Powermatic 80 is rated to 100m (10 ATM) while the Prospex "Turtle" handles 200m (20 ATM) Diver. The Prospex "Turtle" offers superior water resistance.
Our Verdict
Tissot
PRX Powermatic 80
Choose the Tissot PRX Powermatic 80 if you prioritize In-House Automatic (ETA C07.111 base) engineering, Swiss Made craftsmanship, and 100m (10 ATM) water resistance. At $500–$1,000, it delivers Automatic Powermatic 80.111 with 80 Hours power reserve.
Check Price on AmazonSeiko
Prospex "Turtle"
Choose the Seiko Prospex "Turtle" if you value In-House Automatic Manufacture technology, Made in Japan heritage, and 45mm proportions. At $500–$1,000, the Automatic Caliber 4R36 with 41 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Tissot PRX Powermatic 80 and Seiko Prospex "Turtle" represent two distinct approaches to fine watchmaking — the Tissot bringing Swiss Made tradition while Seiko delivers Made in Japan engineering.
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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.