Baltic AquascaphevsSeiko Prospex SPB143

Both are excellent watches with different strengths. The Baltic Aquascaphe offers a more compact size and costs less new. The Seiko Prospex SPB143 excels in overall construction. The best choice depends on your wrist size, budget, and preferred aesthetic.

The Baltic Aquascaphe retails for $530–$600, while the Seiko Prospex SPB143 is priced at $700–$900. Pre-owned, expect $400–$530 and $550–$750 respectively. Actual secondary market prices vary based on condition and demand.

The Baltic Aquascaphe has a 39mm case diameter with 12mm thickness, while the Seiko Prospex SPB143 measures 40.5mm × 13.2mm. Both have lug-to-lug measurements of 47mm and 48mm respectively. Consider your wrist size and wear style when deciding.

The Baltic Aquascaphe is water-resistant to 200m, 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.

The Baltic Aquascaphe uses a automatic Miyota 9039 with 42 hours power reserve. The Seiko Prospex SPB143 features a automatic 6R35 with 70 hours power reserve. Both offer traditional mechanical craftsmanship.

Baltic and Seiko both command strong secondary markets. Pre-owned pricing shows an estimated resale value of $400–$530 for the Aquascaphe and $550–$750 for the Prospex SPB143. Condition, service history, and box/papers significantly impact resale value for both models.