Head-to-Head Comparison

Updated September 5, 2026

Citizen Promaster Sea Eco-Drive Diver vs Seiko Prospex 62MAS Modern Re-interpretation

Two divers compared — $250–$500 vs $1,000–$1,500

Quick Verdict

The Citizen Promaster Sea Eco-Drive Diver ($250–$500) offers Citizen Eco-Drive (Solar Quartz) precision in the tier below the Seiko Prospex 62MAS Modern Re-interpretation ($1,000–$1,500). The Promaster Sea Eco-Drive Diver measures 44mm and is rated 200m (20 ATM) ISO 6425. The Prospex 62MAS Modern Re-interpretation counters with Made in Japan craftsmanship and 200m (20 ATM) water resistance. Both are exceptional divers for their respective tiers.

CitizenPromaster Sea Eco-Drive Diver$250–$500 Check price SeikoProspex 62MAS Modern Re-interpretation$1,000–$1,500 Check price

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Citizen

Promaster Sea Eco-Drive Diver

$250–$500

Check Price Full Review

Seiko

Prospex 62MAS Modern Re-interpretation

$1,000–$1,500

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Specifications Compared

Feature	Citizen Promaster Sea Eco-Drive Diver	Seiko Prospex 62MAS Modern Re-interpretation
Price	$250–$500	$1,000–$1,500
Case Size	44mm	40.5mm
Movement	Eco-Drive Caliber E168	Automatic 6R35
Caliber Type	Citizen Eco-Drive (Solar Quartz)	Seiko In-House Automatic
Power Reserve	—	70 Hours
Water Resistance	200m (20 ATM) ISO 6425	200m (20 ATM)
Crystal	Mineral Crystal	Sapphire
Case Material	Stainless Steel	Stainless Steel with Super-Hard Coating
Origin	Made in Japan	Made in Japan

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Citizen's design language vs Seiko's approach

The Citizen Promaster Sea Eco-Drive Diver features a Stainless Steel case at 44mm with Mineral Crystal protection. The Seiko Prospex 62MAS Modern Re-interpretation offers Stainless Steel with Super-Hard Coating construction at 40.5mm with Sapphire. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Seiko

Eco-Drive Caliber E168 vs Automatic 6R35

The Promaster Sea Eco-Drive Diver runs the Eco-Drive Caliber E168 (Citizen Eco-Drive (Solar Quartz), standard power reserve) at standard frequency. The Prospex 62MAS Modern Re-interpretation uses the Automatic 6R35 (Seiko In-House Automatic, 70 Hours reserve) at 21,600 vph (3 Hz). The Prospex 62MAS Modern Re-interpretation offers a longer power reserve.

📏

Wearability & Fit

Edge: Seiko

44mm vs 40.5mm — different wrist presence

At 44mm, the Promaster Sea Eco-Drive Diver has a bolder wrist presence compared to the Prospex 62MAS Modern Re-interpretation at 40.5mm. Water resistance differs: 200m (20 ATM) ISO 6425 vs 200m (20 ATM).

💰

Value & Cost of Ownership

Edge: Citizen

Citizen sits in the lower tier

The Citizen Promaster Sea Eco-Drive Diver sits at $250–$500 and the Seiko Prospex 62MAS Modern Re-interpretation at $1,000–$1,500. On the specs that outlast any price: the Promaster Sea Eco-Drive Diver uses Mineral Crystal with a standard reserve, against Sapphire and 70 Hours on the Prospex 62MAS Modern Re-interpretation. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Draw

200m (20 ATM) ISO 6425 vs 200m (20 ATM)

The Promaster Sea Eco-Drive Diver is rated to 200m (20 ATM) ISO 6425 while the Prospex 62MAS Modern Re-interpretation handles 200m (20 ATM). Both offer identical water resistance ratings.

Our Verdict

Citizen

Promaster Sea Eco-Drive Diver

Choose the Citizen Promaster Sea Eco-Drive Diver if you prioritize Citizen Eco-Drive (Solar Quartz) engineering, Made in Japan craftsmanship, and 200m (20 ATM) ISO 6425 water resistance. At $250–$500, it delivers Eco-Drive Caliber E168 with solid power reserve.

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Seiko

Prospex 62MAS Modern Re-interpretation

Choose the Seiko Prospex 62MAS Modern Re-interpretation if you value Seiko In-House Automatic technology, Made in Japan heritage, and 40.5mm proportions. At $1,000–$1,500, the Automatic 6R35 with 70 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Citizen Promaster Sea Eco-Drive Diver and Seiko Prospex 62MAS Modern Re-interpretation represent two distinct approaches to the diver category — the Citizen bringing Made in Japan tradition while Seiko delivers Made in Japan engineering.

Frequently Asked Questions

The Seiko Prospex 62MAS Modern Re-interpretation is the better buy if you want a mechanical movement; the Citizen Promaster Sea Eco-Drive Diver is the better buy if you want solar power and quartz accuracy with no servicing. On price, the Citizen Promaster Sea Eco-Drive Diver sits a band lower ($250–$500 against $1,000–$1,500), so it is the cheaper way into the category. Neither is better at everything; the spec table above shows movement, case size, water resistance and crystal side by side so you can weigh what matters to you. We do not test units, so this is the makers' data, not a bench result.

The Citizen Promaster Sea Eco-Drive Diver offers better upfront value, sitting a tier lower at $250–$500. However, the Seiko Prospex 62MAS Modern Re-interpretation may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Promaster Sea Eco-Drive Diver at 44mm with 200m (20 ATM) ISO 6425 water resistance handles everyday situations. The Prospex 62MAS Modern Re-interpretation at 40.5mm with 200m (20 ATM) is similarly capable. The Promaster Sea Eco-Drive Diver uses Mineral Crystal while the Prospex 62MAS Modern Re-interpretation uses Sapphire. Sapphire resists scratches noticeably better than mineral glass.

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How This Page Was Made

Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.