Seiko 5 Sports GMT SSK001 vs Tissot Seastar 1000 Automatic
Seiko's GMT watch meets Tissot's diver
Quick Verdict
The Seiko 5 Sports GMT SSK001 (~$495) offers Seiko In-House Automatic GMT precision at $20 less than the Tissot Seastar 1000 Automatic (~$515). The Seastar 1000 Automatic counters with Swiss Made craftsmanship and 300m (30 ATM) water resistance. Both are exceptional watches for their respective price points.
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Specifications Compared
| Feature | Seiko 5 Sports GMT SSK001 | Tissot Seastar 1000 Automatic |
|---|---|---|
| Price | ~$495 | ~$515 |
| Case Size | 42.5mm | 40mm |
| Movement | Automatic Caliber 4R34 (True GMT) | Automatic Powermatic 80 (Caliber 80.111) |
| Caliber Type | Seiko In-House Automatic GMT | ETA/Tissot Automatic |
| Power Reserve | 41 Hours | 80 Hours |
| Water Resistance | 100m (10 ATM) | 300m (30 ATM) |
| Crystal | Hardlex 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
Movement & Performance
Automatic Caliber 4R34 (True GMT) vs Automatic Powermatic 80 (Caliber 80.111)
Wearability & Fit
42.5mm vs 40mm — different wrist presence
Value & Cost of Ownership
Seiko is $20 more affordable
Water Resistance
100m (10 ATM) vs 300m (30 ATM)
Our Verdict
Seiko
5 Sports GMT SSK001
Choose the Seiko 5 Sports GMT SSK001 if you prioritize Seiko In-House Automatic GMT engineering, Made in Japan craftsmanship, and 100m (10 ATM) water resistance. At ~$495, it delivers Automatic Caliber 4R34 (True GMT) with 41 Hours power reserve.
Check Price on AmazonTissot
Seastar 1000 Automatic
Choose the Tissot Seastar 1000 Automatic if you value ETA/Tissot Automatic technology, Swiss Made heritage, and 40mm proportions. At ~$515, 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 5 Sports GMT SSK001 and Tissot Seastar 1000 Automatic 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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