
Omega
Aqua Terra 38
Ref. 220.10.38.20.03.001
$5k–$6k
Pre-owned: $4k–$5k
Complete head-to-head comparison
Comparing the Omega Aqua Terra 38 ($5k–$6k, 150m WR, 38mm) against the Omega Speedmaster Moonwatch ($7k–$7k, 50m WR, 42mm). The Omega Aqua Terra 38 is the more affordable option by $2k.

Omega
Ref. 220.10.38.20.03.001
$5k–$6k
Pre-owned: $4k–$5k

Omega
Ref. 310.30.42.50.01.001
$7k–$7k
Pre-owned: $6k–$7k
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Community Verdict
Too Close to Call
Both sit in a similar price range: Omega Aqua Terra 38 at $5k–$6k vs Omega Speedmaster Moonwatch at $7k–$7k — choose based on use case and style preference. Omega Aqua Terra 38 offers automatic craftsmanship; Omega Speedmaster Moonwatch runs quartz for higher accuracy and lower maintenance. Omega Aqua Terra 38 edges ahead on water resistance: 150m vs 50m.
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Both are excellent watches with different strengths. The Omega Aqua Terra 38 offers a more compact size and costs less new. The Omega Speedmaster Moonwatch excels in overall construction. The best choice depends on your wrist size, budget, and preferred aesthetic.
The Omega Aqua Terra 38 retails for $5k–$6k, while the Omega Speedmaster Moonwatch is priced at $7k–$7k. Pre-owned, expect $4k–$5k and $6k–$7k respectively. Actual secondary market prices vary based on condition and demand.
The Omega Aqua Terra 38 has a 38mm case diameter with 11.1mm thickness, while the Omega Speedmaster Moonwatch measures 42mm × 13.2mm. Both have lug-to-lug measurements of 45mm and 47mm respectively. Consider your wrist size and wear style when deciding.
The Omega Aqua Terra 38 is water-resistant to 150m, while the Omega Speedmaster Moonwatch offers 50m. 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 Omega Aqua Terra 38 uses a automatic Cal. 8900 with 55 hours power reserve. The Omega Speedmaster Moonwatch features a manual Cal. 3861 with 50 hours power reserve. Both offer traditional mechanical craftsmanship.
Omega and Omega both command strong secondary markets. Pre-owned pricing shows an estimated resale value of $4k–$5k for the Aqua Terra 38 and $6k–$7k for the Speedmaster Moonwatch. Condition, service history, and box/papers significantly impact resale value for both models.
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