Halios Seaforth vs Seiko Prospex SPB143
Head-to-head comparison · Community ratings · Pricing
Quick Verdict
Both sit in a similar price range: Halios Seaforth at $850–$1k vs Seiko Prospex SPB143 at $700–$900 — choose based on use case and style preference. Choose Halios Seaforth (300m WR) for diving; Seiko Prospex SPB143 (200m) suits everyday wear. Case size: Seiko Prospex SPB143 at 40.5mm suits larger wrists; Halios Seaforth at 38mm is the more compact option.
Specifications Compared
Frequently Asked Questions
Which is better: Halios Seaforth or Seiko Prospex SPB143?▼
Both are excellent watches with different strengths. The Halios Seaforth offers a more compact size and costs more new. The Seiko Prospex SPB143 excels in overall construction. The best choice depends on your wrist size, budget, and preferred aesthetic.
What's the price difference?▼
The Halios Seaforth retails for $850–$1k, while the Seiko Prospex SPB143 is priced at $700–$900. Pre-owned, expect $700–$900 and $550–$750 respectively. Actual secondary market prices vary based on condition and demand.
How do the case sizes compare?▼
The Halios Seaforth has a 38mm case diameter with 11.5mm thickness, while the Seiko Prospex SPB143 measures 40.5mm × 13.2mm. Both have lug-to-lug measurements of 46mm and 48mm respectively. Consider your wrist size and wear style when deciding.
Which has better water resistance?▼
The Halios Seaforth is water-resistant to 300m, while the Seiko Prospex SPB143 offers 200m. Both are suitable for swimming and snorkeling at their respective depths. For professional diving, verify the rating exceeds 300m and includes a screw-down crown.
How do the movements compare?▼
The Halios Seaforth uses a automatic SW200 with 38 hours power reserve. The Seiko Prospex SPB143 features a automatic 6R35 with 70 hours power reserve. Both offer traditional mechanical craftsmanship.
Which holds value better?▼
Halios and Seiko both command strong secondary markets. Pre-owned pricing shows an estimated resale value of $700–$900 for the Seaforth and $550–$750 for the Prospex SPB143. Condition, service history, and box/papers significantly impact resale value for both models.