Tissot PRX Powermatic 80 35mm vs Seiko 5 Sports GMT SSK001
Tissot's timepiece meets Seiko's GMT watch
Quick Verdict
The Seiko 5 Sports GMT SSK001 ($250–$500) delivers Seiko In-House Automatic GMT technology in the tier below the Tissot PRX Powermatic 80 35mm ($500–$1,000). The 5 Sports GMT SSK001 measures 42.5mm and is rated 100m (10 ATM). The PRX Powermatic 80 35mm justifies its premium with Swiss Made heritage and Automatic Powermatic 80 (Caliber 80.111). Both represent excellent choices in the luxury watch category.
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Specifications Compared
| Feature | Tissot PRX Powermatic 80 35mm | Seiko 5 Sports GMT SSK001 |
|---|---|---|
| Price | $500–$1,000 | $250–$500 |
| Case Size | 35mm | 42.5mm |
| Movement | Automatic Powermatic 80 (Caliber 80.111) | Automatic Caliber 4R34 (True GMT) |
| Caliber Type | ETA/Tissot Automatic | Seiko In-House Automatic GMT |
| Power Reserve | 80 Hours | 41 Hours |
| Water Resistance | 100m (10 ATM) | 100m (10 ATM) |
| Crystal | Sapphire Crystal | Hardlex Crystal |
| Case Material | 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 35mm features a Stainless Steel case at 35mm with Sapphire Crystal protection. The Seiko 5 Sports GMT SSK001 offers Stainless Steel construction at 42.5mm with Hardlex Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Powermatic 80 (Caliber 80.111) vs Automatic Caliber 4R34 (True GMT)
The PRX Powermatic 80 35mm runs the Automatic Powermatic 80 (Caliber 80.111) (ETA/Tissot Automatic, 80 Hours power reserve) at 21,600 vph (3 Hz) frequency. The 5 Sports GMT SSK001 uses the Automatic Caliber 4R34 (True GMT) (Seiko In-House Automatic GMT, 41 Hours reserve) at 21,600 vph (3 Hz). The PRX Powermatic 80 35mm edges ahead on power reserve.
Wearability & Fit
35mm vs 42.5mm — different wrist presence
At 35mm, the PRX Powermatic 80 35mm wears more compactly on smaller wrists compared to the 5 Sports GMT SSK001 at 42.5mm. Water resistance differs: 100m (10 ATM) vs 100m (10 ATM).
Value & Cost of Ownership
Seiko sits in the lower tier
The Tissot PRX Powermatic 80 35mm sits at $500–$1,000 and the Seiko 5 Sports GMT SSK001 at $250–$500. On the specs that outlast any price: the PRX Powermatic 80 35mm uses Sapphire Crystal with 80 Hours, against Hardlex Crystal and 41 Hours on the 5 Sports GMT SSK001. Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 100m (10 ATM)
The PRX Powermatic 80 35mm is rated to 100m (10 ATM) while the 5 Sports GMT SSK001 handles 100m (10 ATM). Both offer identical water resistance ratings.
Our Verdict
Tissot
PRX Powermatic 80 35mm
Choose the Tissot PRX Powermatic 80 35mm if you prioritize ETA/Tissot Automatic engineering, Swiss Made craftsmanship, and 100m (10 ATM) water resistance. At $500–$1,000, it delivers Automatic Powermatic 80 (Caliber 80.111) with 80 Hours power reserve.
Check Price on AmazonSeiko
5 Sports GMT SSK001
Choose the Seiko 5 Sports GMT SSK001 if you value Seiko In-House Automatic GMT technology, Made in Japan heritage, and 42.5mm proportions. At $250–$500, the Automatic Caliber 4R34 (True GMT) with 41 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Tissot PRX Powermatic 80 35mm and Seiko 5 Sports GMT SSK001 represent two distinct approaches to fine watchmaking — the Tissot bringing Swiss Made tradition while Seiko delivers Made in 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.