Seiko Prospex "Turtle" vs Tissot Seastar 1000 Automatic
Two divers compared — $500–$1,000 vs $500–$1,000
Quick Verdict
The Seiko Prospex "Turtle" ($500–$1,000) and Tissot Seastar 1000 Automatic ($500–$1,000) are closely matched divers at similar price points. The Prospex "Turtle" emphasizes In-House Automatic Manufacture engineering while the Seastar 1000 Automatic focuses on Swiss Made craftsmanship.
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Specifications Compared
| Feature | Seiko Prospex "Turtle" | Tissot Seastar 1000 Automatic |
|---|---|---|
| Price | $500–$1,000 | $500–$1,000 |
| Case Size | 45mm | 40mm |
| Movement | Automatic Caliber 4R36 | Automatic Powermatic 80 (Caliber 80.111) |
| Caliber Type | In-House Automatic Manufacture | ETA/Tissot Automatic |
| Power Reserve | 41 Hours | 80 Hours |
| Water Resistance | 200m (20 ATM) Diver | 300m (30 ATM) |
| Crystal | Sapphire 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
The Seiko Prospex "Turtle" features a Stainless Steel case at 45mm with Sapphire Crystal protection. The Tissot Seastar 1000 Automatic offers Stainless Steel construction at 40mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Caliber 4R36 vs Automatic Powermatic 80 (Caliber 80.111)
The Prospex "Turtle" runs the Automatic Caliber 4R36 (In-House Automatic Manufacture, 41 Hours power reserve) at 21,600 vph (3 Hz) frequency. The Seastar 1000 Automatic uses the Automatic Powermatic 80 (Caliber 80.111) (ETA/Tissot Automatic, 80 Hours reserve) at 21,600 vph (3 Hz). The Seastar 1000 Automatic offers a longer power reserve.
Wearability & Fit
45mm vs 40mm — different wrist presence
At 45mm, the Prospex "Turtle" has a bolder wrist presence compared to the Seastar 1000 Automatic at 40mm. Water resistance differs: 200m (20 ATM) Diver vs 300m (30 ATM).
Value & Cost of Ownership
Same tier — different value propositions
The Seiko Prospex "Turtle" sits at $500–$1,000 and the Tissot Seastar 1000 Automatic at $500–$1,000. On the specs that outlast any price: the Prospex "Turtle" uses Sapphire Crystal with 41 Hours, against Sapphire Crystal and 80 Hours on the Seastar 1000 Automatic. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) Diver vs 300m (30 ATM)
The Prospex "Turtle" is rated to 200m (20 ATM) Diver while the Seastar 1000 Automatic handles 300m (30 ATM). The Seastar 1000 Automatic offers superior water resistance.
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–$1,000, it delivers Automatic Caliber 4R36 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 $500–$1,000, 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 Prospex "Turtle" and Tissot Seastar 1000 Automatic represent two distinct approaches to the diver category — the Seiko bringing Made in Japan tradition while Tissot delivers Swiss Made 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.