Head-to-Head Comparison

Updated September 5, 2026

Bulova Classic Automatic 98A139 vs Citizen Promaster Sea Eco-Drive Diver

Bulova's timepiece meets Citizen's diver

Quick Verdict

The Bulova Classic Automatic 98A139 ($250–$500) and Citizen Promaster Sea Eco-Drive Diver ($250–$500) are closely matched timepieces at similar price points. The Classic Automatic 98A139 emphasizes Self-Winding Automatic engineering while the Promaster Sea Eco-Drive Diver focuses on Made in Japan craftsmanship.

BulovaClassic Automatic 98A139$250–$500 Check price CitizenPromaster Sea Eco-Drive Diver$250–$500 Check price

Transparency — We earn a small commission on purchases made through our Amazon links. This doesn't affect our editorial independence.

Bulova

Classic Automatic 98A139

$250–$500

Check Price Full Review

Citizen

Promaster Sea Eco-Drive Diver

$250–$500

Check Price Full Review

Specifications Compared

Feature	Bulova Classic Automatic 98A139	Citizen Promaster Sea Eco-Drive Diver
Price	$250–$500	$250–$500
Case Size	45mm	44mm
Movement	Automatic, 21 Jewels	Eco-Drive Caliber E168
Caliber Type	Self-Winding Automatic	Citizen Eco-Drive (Solar Quartz)
Power Reserve	—	—
Water Resistance	30m (3 ATM)	200m (20 ATM) ISO 6425
Crystal	Domed Crystal	Mineral Crystal
Case Material	Black Ion-Plated Stainless Steel	Stainless Steel
Origin	Japanese Movement	Made in Japan

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Bulova's design language vs Citizen's approach

The Bulova Classic Automatic 98A139 features a Black Ion-Plated Stainless Steel case at 45mm with Domed Crystal protection. The Citizen Promaster Sea Eco-Drive Diver offers Stainless Steel construction at 44mm with Mineral Crystal. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Draw

Automatic, 21 Jewels vs Eco-Drive Caliber E168

The Classic Automatic 98A139 runs the Automatic, 21 Jewels (Self-Winding Automatic, standard power reserve) at standard frequency. The Promaster Sea Eco-Drive Diver uses the Eco-Drive Caliber E168 (Citizen Eco-Drive (Solar Quartz), standard reserve) at standard. Power reserves are closely matched.

📏

Wearability & Fit

Edge: Citizen

45mm vs 44mm — different wrist presence

At 45mm, the Classic Automatic 98A139 has a bolder wrist presence compared to the Promaster Sea Eco-Drive Diver at 44mm. Water resistance differs: 30m (3 ATM) vs 200m (20 ATM) ISO 6425.

💰

Value & Cost of Ownership

Edge: Draw

Same tier — different value propositions

The Bulova Classic Automatic 98A139 sits at $250–$500 and the Citizen Promaster Sea Eco-Drive Diver at $250–$500. On the specs that outlast any price: the Classic Automatic 98A139 uses Domed Crystal with a standard reserve, against Mineral Crystal and a standard reserve on the Promaster Sea Eco-Drive Diver. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Citizen

30m (3 ATM) vs 200m (20 ATM) ISO 6425

The Classic Automatic 98A139 is rated to 30m (3 ATM) while the Promaster Sea Eco-Drive Diver handles 200m (20 ATM) ISO 6425. The Promaster Sea Eco-Drive Diver offers superior water resistance.

Our Verdict

Bulova

Classic Automatic 98A139

Choose the Bulova Classic Automatic 98A139 if you prioritize Self-Winding Automatic engineering, Japanese Movement craftsmanship, and 30m (3 ATM) water resistance. At $250–$500, it delivers Automatic, 21 Jewels with solid power reserve.

Check Price on Amazon

Citizen

Promaster Sea Eco-Drive Diver

Choose the Citizen Promaster Sea Eco-Drive Diver if you value Citizen Eco-Drive (Solar Quartz) technology, Made in Japan heritage, and 44mm proportions. At $250–$500, the Eco-Drive Caliber E168 with ample power reserve makes it a compelling choice.

Check Price on Amazon

Try Prime Free — Free Shipping on Both Watches Students & 18–24: start Prime for Young Adults free

The Bottom Line

The Bulova Classic Automatic 98A139 and Citizen Promaster Sea Eco-Drive Diver represent two distinct approaches to fine watchmaking — the Bulova bringing Japanese Movement tradition while Citizen delivers Made in Japan engineering.

Frequently Asked Questions

The Bulova Classic Automatic 98A139 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. For water, the Citizen Promaster Sea Eco-Drive Diver is rated 200 m against 30 m, which is the difference between swimming and diving on one side and splashes on the other. 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.

Both are priced similarly, making this a question of preference rather than value. The Classic Automatic 98A139 emphasizes Self-Winding Automatic technology while the Promaster Sea Eco-Drive Diver prioritizes Citizen Eco-Drive (Solar Quartz) precision.

Both are suitable for daily wear. The Classic Automatic 98A139 at 45mm with 30m (3 ATM) water resistance handles everyday situations. The Promaster Sea Eco-Drive Diver at 44mm with 200m (20 ATM) ISO 6425 is similarly capable. The Classic Automatic 98A139 uses Domed Crystal while the Promaster Sea Eco-Drive Diver uses Mineral Crystal.

More Comparisons

Casio Duro vs Citizen Promaster Diver

Battery quartz or solar quartz, both 44mm and 200m

Citizen Promaster Diver vs Seiko Turtle

Solar quartz or mechanical automatic, both 200m

Tag Heuer Carrera Chronograph vs Bulova Classic Automatic 98A139

Tag Heuer's chronograph meets Bulova's timepiece

Explore These Watches

Bulova Classic Automatic 98A139 — Full Review Citizen Promaster Sea Eco-Drive Diver — Full Review Browse All Guides

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.