Tissot PRX Powermatic 80 vs Seiko 5 Sports 5KX
Two timepieces compared — $500–$1,000 vs $250–$500
Quick Verdict
The Seiko 5 Sports 5KX ($250–$500) delivers Seiko In-House Automatic technology in the tier below the Tissot PRX Powermatic 80 ($500–$1,000). The 5 Sports 5KX measures 42.5mm and is rated 100m (10 ATM). The PRX Powermatic 80 justifies its premium with Swiss Made heritage and Automatic Powermatic 80.111. Both represent excellent choices in the timepiece category.
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Specifications Compared
| Feature | Tissot PRX Powermatic 80 | Seiko 5 Sports 5KX |
|---|---|---|
| Price | $500–$1,000 | $250–$500 |
| Case Size | 40mm | 42.5mm |
| Movement | Automatic Powermatic 80.111 | Automatic Caliber 4R36 |
| Caliber Type | In-House Automatic (ETA C07.111 base) | Seiko In-House Automatic |
| Power Reserve | 80 Hours | 41 Hours |
| Water Resistance | 100m (10 ATM) | 100m (10 ATM) |
| Crystal | Scratch-resistant Sapphire | Hardlex 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 5 Sports 5KX offers Stainless Steel construction at 42.5mm with Hardlex Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Powermatic 80.111 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 5 Sports 5KX uses the Automatic Caliber 4R36 (Seiko In-House Automatic, 41 Hours reserve) at 21,600 vph (3 Hz). The PRX Powermatic 80 edges ahead on power reserve.
Wearability & Fit
40mm vs 42.5mm — different wrist presence
At 40mm, the PRX Powermatic 80 wears more compactly on smaller wrists compared to the 5 Sports 5KX 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 sits at $500–$1,000 and the Seiko 5 Sports 5KX at $250–$500. On the specs that outlast any price: the PRX Powermatic 80 uses Scratch-resistant Sapphire with 80 Hours, against Hardlex Crystal and 41 Hours on the 5 Sports 5KX. Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 100m (10 ATM)
The PRX Powermatic 80 is rated to 100m (10 ATM) while the 5 Sports 5KX handles 100m (10 ATM). Both offer identical water resistance ratings.
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
5 Sports 5KX
Choose the Seiko 5 Sports 5KX if you value Seiko In-House Automatic technology, Made in Japan heritage, and 42.5mm proportions. At $250–$500, 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 5 Sports 5KX represent two distinct approaches to the timepiece category — 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.