Auto sport comparison
Seiko 5 Sports SRPD (42.5 mm) vs Citizen Tsuyosa
Verdict. Today the Seiko 5 Sports SRPD (42.5 mm) (SRPD55) is the better value by our formula: Value Score 100 vs 82, with 68 spec points at $280.00. The other watch costs $76.25 more. Prices as of November 3, 2026, 18:15 UTC.
Side by side
Seiko 5 Sports SRPD (42.5 mm) vs Citizen Tsuyosa: specs and price
| Spec |  Seiko 5 Sports SRPD (42.5 mm) SRPD55 · priced variant of 6 |  Citizen Tsuyosa NJ0150-56X · priced variant of 3 |
|---|---|---|
| Price on Amazon today | $280.00 | $356.25 |
| Value Score (within type) | 100 | 82 |
| Spec points | 68 | 58 |
| Spec points per $100 | 24.3 | 16.3 |
| Movement | Automatic (4R36) | Automatic (8210) |
| Power reserve | 41 h | 40 h |
| Crystal | Hardlex | Mineral |
| Water resistance | 100 m | 50 m |
| Screw-down crown | No | No |
| Case diameter | 42.5 mm | 40 mm |
| Lug-to-lug | 46 mm | — |
| Thickness | 13.4 mm | 11.7 mm |
| Lug width | 22 mm | — |
| Fits wrist from | ≥ 16.6 cm (6.5″) | — |
| Strap / bracelet | Steel | Steel |
| Made in | — | — |
| Amazon sales rank | #54 | #393 |
FAQ
Questions about the Seiko 5 Sports SRPD (42.5 mm) and the Citizen Tsuyosa
Which is cheaper on Amazon today?
As of November 3, 2026, 18:15 UTC, the Seiko 5 Sports SRPD (42.5 mm) (SRPD55) is $280.00 and the Citizen Tsuyosa (NJ0150-56X) is $356.25; the difference is $76.25. Amazon's price at checkout applies.
Context
Where both sit among automatic sport watches
| # | Watch | Movement | Crystal | Water res. | Case diameter × lug-to-lug | Fits wrist | Spec pts | Price | Value Score | Buy |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | | Automatic (4R36) | Hardlex | 100 m | 42.5 × 46 mm | ≥ 16.6 cm (6.5″) | 68 | $280.00third-party | 100 | Amazon |
| 2 |  | Automatic (4R36) | Hardlex | 100 m | 40 × 44.6 mm | ≥ 16.1 cm (6.3″) | 68 | $306.00third-party | 96 | Amazon |
| 3 | | Automatic (8210) | Mineral | 50 m | 40 mm | — | 58 | $356.25 | 82 | Amazon |
| 4 | Automatic (Sistem51) | — | 30 m | 42 mm | — | 41 | $275.00 | 78 | Amazon | |
| 5 | Automatic (Miyota 821A) | Mineral | 100 m | 45 mm | — | 58 | $440.00 | 74 | Amazon | |
| 6 |  | Automatic (Powermatic 80) | Sapphire | 100 m | 35 × 39.5 mm | ≥ 14.2 cm (5.6″) | 76 | $795.00 | 63 | Amazon |
| 7 |  | Automatic (Powermatic 80) | Sapphire | 100 m | 40 × 44.5 mm | ≥ 16 cm (6.3″) | 76 | $850.00 | 61 | Amazon |
| 8 |  | Automatic (4R36) | Hardlex | 100 m | 39.4 mm | — | 65 | $252.00third-partyships later | 100 | Amazon |
Amazon.com prices as of November 3, 2026, 18:15 UTC — details. third-party = sold by a marketplace seller, not Amazon (warranty may differ); ships later = not in stock today, never crowned best value.