
Omega
Speedmaster Moonwatch
Ref. 310.30.42.50.01.001
$7k–$7k
Pre-owned: $6k–$7k
Complete head-to-head comparison
Comparing the Omega Speedmaster Moonwatch ($7k–$7k, 50m WR, 42mm) against the Omega Aqua Terra 38 ($5k–$6k, 150m WR, 38mm). The Omega Aqua Terra 38 is the more affordable option by $2k.

Omega
Ref. 310.30.42.50.01.001
$7k–$7k
Pre-owned: $6k–$7k

Omega
Ref. 220.10.38.20.03.001
$5k–$6k
Pre-owned: $4k–$5k
Price
Water Resistance
Score
Repurchase
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Community Verdict
Too Close to Call
Both sit in a similar price range: Omega Speedmaster Moonwatch at $7k–$7k vs Omega Aqua Terra 38 at $5k–$6k — choose based on use case and style preference. Omega Speedmaster Moonwatch offers manual craftsmanship; Omega Aqua Terra 38 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 Speedmaster Moonwatch offers a larger case and costs more new. The Omega Aqua Terra 38 excels in water resistance. The best choice depends on your wrist size, budget, and preferred aesthetic.
The Omega Speedmaster Moonwatch retails for $7k–$7k, while the Omega Aqua Terra 38 is priced at $5k–$6k. Pre-owned, expect $6k–$7k and $4k–$5k respectively. Actual secondary market prices vary based on condition and demand.
The Omega Speedmaster Moonwatch has a 42mm case diameter with 13.2mm thickness, while the Omega Aqua Terra 38 measures 38mm × 11.1mm. Both have lug-to-lug measurements of 47mm and 45mm respectively. Consider your wrist size and wear style when deciding.
The Omega Speedmaster Moonwatch is water-resistant to 50m, while the Omega Aqua Terra 38 offers 150m. 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 Speedmaster Moonwatch uses a manual Cal. 3861 with 50 hours power reserve. The Omega Aqua Terra 38 features a automatic Cal. 8900 with 55 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 $6k–$7k for the Speedmaster Moonwatch and $4k–$5k for the Aqua Terra 38. Condition, service history, and box/papers significantly impact resale value for both models.
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