Seiko Prospex "Turtle" vs Seiko 5 Sports GMT SSK001
Seiko's diver meets Seiko's GMT watch
Quick Verdict
The Seiko 5 Sports GMT SSK001 (~$495) delivers Seiko In-House Automatic GMT technology at $5 less than the Seiko Prospex "Turtle" (~$500). The Prospex "Turtle" justifies its premium with Made in Japan heritage and Automatic Caliber 4R36. Both represent excellent choices in the luxury watch category.
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Specifications Compared
| Feature | Seiko Prospex "Turtle" | Seiko 5 Sports GMT SSK001 |
|---|---|---|
| Price | ~$500 | ~$495 |
| Case Size | 45mm | 42.5mm |
| Movement | Automatic Caliber 4R36 | Automatic Caliber 4R34 (True GMT) |
| Caliber Type | In-House Automatic Manufacture | Seiko In-House Automatic GMT |
| Power Reserve | 41 Hours | 41 Hours |
| Water Resistance | 200m (20 ATM) Diver | 100m (10 ATM) |
| Crystal | Sapphire Crystal | Hardlex Crystal |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Made in Japan | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Seiko's design language vs Seiko's approach
Movement & Performance
Automatic Caliber 4R36 vs Automatic Caliber 4R34 (True GMT)
Wearability & Fit
45mm vs 42.5mm — different wrist presence
Value & Cost of Ownership
Seiko is $5 more affordable
Water Resistance
200m (20 ATM) Diver vs 100m (10 ATM)
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, it delivers Automatic Caliber 4R36 with 41 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 ~$495, the Automatic Caliber 4R34 (True GMT) with 41 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Seiko Prospex "Turtle" and Seiko 5 Sports GMT SSK001 represent two distinct approaches to fine watchmaking — the Seiko bringing Made in Japan tradition while Seiko delivers Made in Japan engineering.