Citizen
Promaster
Made in Japan
Ref. BN0150-28E
Edition Manufacture
Promaster
Citizen
Promaster Sea Eco-Drive Diver
“ISO 6425 certified. Solar-powered. Never needs a battery. The professional dive tool that costs less than a weekend away but lasts a lifetime.”
From
$290
Approx. retail, verified May 2026 — check retailer for current price
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Ref. BN0150-28E
Manufacture
Complication
Date, Power Reserve Indicator
The Editorial
ISO 6425 certified. Solar-powered. Never needs a battery. The professional dive tool that costs less than a weekend away but lasts a lifetime.
Why This Watch
A piece worth
acquiring.
Ideal for
The diver on a budget. The outdoorsman who needs a tool watch that never dies. Anyone tired of replacing batteries.
The Promaster Sea is ISO 6425 certified — meaning it passed the actual international dive watch standard, not just a marketing claim. The Eco-Drive technology converts any light to energy, giving it effectively unlimited battery life. At $290, it's the most affordable genuine dive watch from a major manufacturer. The unidirectional rotating bezel, screw-down crown, and 200m water resistance make this a real tool watch, not a desk diver.
Collector's Note
The BN0150 is often called the best value dive watch ever made. It's been the default recommendation in the r/Watches buying guide for years.
Frequently Asked
Questions About the Promaster Sea Eco-Drive Diver
The Citizen Promaster Sea Eco-Drive Diver at $290 offers ISO 6425 certified. Solar-powered. Never needs a battery. The professional dive tool that costs less than a weekend away but lasts a lifetime. It features Eco-Drive Caliber E168 and is built to the standards expected of Citizen's manufacturing heritage.
The Citizen Promaster Sea Eco-Drive Diver uses the Eco-Drive Caliber E168. The case measures 44mm with 200m (20 ATM) ISO 6425 water resistance.
The Citizen Promaster Sea Eco-Drive Diver (reference BN0150-28E) retails at approximately $290 USD. Check current pricing through authorized dealers and the secondary market for the best available value.
Yes. The Citizen Promaster Sea Eco-Drive Diver is a well-regarded dive watch at the $290 price point. ISO 6425 certified. Solar-powered. Never needs a battery. The professional dive tool that costs less than a weekend away but lasts a lifetime. It competes favorably with other watches in its category and price range.
The Citizen Promaster Sea Eco-Drive Diver has 200m (20 ATM) ISO 6425. As a dive watch, it meets the requirements for recreational and professional diving.
Luminescence
Legibility in
Absolute Darkness.
Experience the breathtaking clarity of Swiss Super-LumiNova. Use the interactive flashlight to reveal the glowing indices and hands engineered for optimal legibility in the most extreme conditions.
Hover to Reveal Lume
The Maison
Citizen
“Better Starts Now”
Founded
1918
Origin
Tokyo, Japan
House Style
Technical reliability, integrated bracelets, accessible Japanese engineering.
World leader in light-powered Eco-Drive and atomic timekeeping.
Citizen produces every component in-house — from the silicon escapements down to the hairsprings — making it one of the most vertically integrated watch manufacturers in the world. The Tsuyosa ("strength") line marks Citizen's answer to the integrated-bracelet sport watch trend with traditional mechanical movements.
Technical Prowess
Citizen Promaster Sea Eco-Drive Diver Specifications
| Specification | Details |
|---|---|
| Reference | BN0150-28E |
| Origin | Made in Japan |
| Case Size | 44mm |
| Case Material | Stainless Steel |
| Movement | Eco-Drive Caliber E168 |
| Caliber Class | Citizen Eco-Drive (Solar Quartz) |
| Crystal | Mineral Crystal |
| Water Resistance | 200m (20 ATM) ISO 6425 |
| Complications | Date, Power Reserve Indicator |
Acquire
Begin your collection
with the Citizen.
Curated from authorized dealers. Authenticated and insured. Available now through Amazon.
Compare
How Does the Promaster Sea Eco-Drive Diver Stack Up?
Citizen Promaster Sea Eco-Drive Diver vs Tag Heuer Carrera Chronograph
Tag Heuer's chronograph meets Citizen's diver
Citizen Promaster Sea Eco-Drive Diver vs Tissot PRX Powermatic 80
Tissot's timepiece meets Citizen's diver
Citizen Promaster Sea Eco-Drive Diver vs Breitling Navitimer B01
Breitling's chronograph meets Citizen's diver
Citizen Promaster Sea Eco-Drive Diver vs Citizen Tsuyosa Automatic
Citizen's timepiece meets Citizen's diver
Citizen Promaster Sea Eco-Drive Diver vs Junghans Max Bill Chronoscope
Junghans's chronograph meets Citizen's diver
Citizen Promaster Sea Eco-Drive Diver vs Tudor Black Bay 58
Two divers compared — $4,480 vs $290
Citizen Promaster Sea Eco-Drive Diver vs Bulova Devil Diver Oceanographer 96B350
Two divers compared — $529 vs $290
Citizen Promaster Sea Eco-Drive Diver vs Bulova Surveyor Automatic
Bulova's dress watch meets Citizen's diver
Citizen Promaster Sea Eco-Drive Diver vs Casio Vintage A168WA
Casio's chronograph meets Citizen's diver
Citizen Promaster Sea Eco-Drive Diver vs Citizen Promaster Air Skyhawk A-T
Citizen's diver meets Citizen's chronograph
Citizen Promaster Sea Eco-Drive Diver vs Citizen Tsuyosa Automatic (Green Dial)
Citizen's diver meets Citizen's timepiece
Citizen Promaster Sea Eco-Drive Diver vs Frederique Constant Slimline Moonphase Manufacture
Citizen's diver meets Frederique Constant's dress watch
Citizen Promaster Sea Eco-Drive Diver vs Frederique Constant Classic Quartz Moonphase
Citizen's diver meets Frederique Constant's dress watch
Citizen Promaster Sea Eco-Drive Diver vs Frederique Constant Highlife Automatic COSC
Citizen's diver meets Frederique Constant's timepiece
Citizen Promaster Sea Eco-Drive Diver vs Casio G-Shock GA-B2100 CasiOak
Two divers compared — $290 vs $144
Citizen Promaster Sea Eco-Drive Diver vs Hamilton Khaki Field Mechanical 38mm
Citizen's diver meets Hamilton's field watch
Citizen Promaster Sea Eco-Drive Diver vs Hamilton Intra-Matic Auto Chronograph
Citizen's diver meets Hamilton's chronograph
Citizen Promaster Sea Eco-Drive Diver vs Hamilton Khaki Aviation Pilot Auto
Citizen's diver meets Hamilton's pilot watch
Citizen Promaster Sea Eco-Drive Diver vs Hamilton Ventura Quartz
Citizen's diver meets Hamilton's timepiece
Citizen Promaster Sea Eco-Drive Diver vs Junghans Form A Automatic
Citizen's diver meets Junghans's dress watch
Citizen Promaster Sea Eco-Drive Diver vs Hamilton Khaki Field Automatic
Citizen's diver meets Hamilton's field watch
Citizen Promaster Sea Eco-Drive Diver vs Longines HydroConquest Automatic
Two divers compared — $290 vs $2,350
Citizen Promaster Sea Eco-Drive Diver vs Longines Master Collection Moonphase
Citizen's diver meets Longines's dress watch
Citizen Promaster Sea Eco-Drive Diver vs Bulova Lunar Pilot Chronograph
Citizen's diver meets Bulova's chronograph
Citizen Promaster Sea Eco-Drive Diver vs Mido Multifort Powerwind Chronometer
Citizen's diver meets Mido's chronograph
Citizen Promaster Sea Eco-Drive Diver vs Mido Ocean Star GMT
Two divers compared — $290 vs $1,410
Citizen Promaster Sea Eco-Drive Diver vs Orient Bambino Version 2
Citizen's diver meets Orient's dress watch
Citizen Promaster Sea Eco-Drive Diver vs Orient Kamasu Automatic Diver
Two divers compared — $290 vs $345
Citizen Promaster Sea Eco-Drive Diver vs Oris Aquis Date Calibre 400
Two divers compared — $290 vs $2,595
Citizen Promaster Sea Eco-Drive Diver vs Seiko Presage Cocktail Time
Citizen's diver meets Seiko's dress watch
Citizen Promaster Sea Eco-Drive Diver vs Seiko Presage Cocktail Time SRPE15
Citizen's diver meets Seiko's timepiece
Citizen Promaster Sea Eco-Drive Diver vs Seiko Presage SSA425 Open Heart
Citizen's diver meets Seiko's timepiece
Citizen Promaster Sea Eco-Drive Diver vs Seiko Prospex "Turtle"
Two divers compared — $290 vs $500
Citizen Promaster Sea Eco-Drive Diver vs Tissot PRX Powermatic 80 35mm
Citizen's diver meets Tissot's timepiece
Citizen Promaster Sea Eco-Drive Diver vs Timex Q Timex Reissue
Two divers compared — $290 vs $140
Citizen Promaster Sea Eco-Drive Diver vs Rado True Square Automatic
Citizen's diver meets Rado's timepiece
Citizen Promaster Sea Eco-Drive Diver vs Raymond Weil Freelancer Open Heart
Citizen's diver meets Raymond Weil's timepiece
Citizen Promaster Sea Eco-Drive Diver vs Seiko 5 Sports GMT SSK001
Citizen's diver meets Seiko's GMT watch
Citizen Promaster Sea Eco-Drive Diver vs Seiko 5 Sports 5KX
Citizen's diver meets Seiko's timepiece
Citizen Promaster Sea Eco-Drive Diver vs Seiko Prospex Alpinist
Two divers compared — $290 vs $620
Citizen Promaster Sea Eco-Drive Diver vs Seiko Prospex Samurai SRPL13
Two divers compared — $290 vs $590
Citizen Promaster Sea Eco-Drive Diver vs Tag Heuer Aquaracer Professional 300
Two divers compared — $290 vs $3,350
Citizen Promaster Sea Eco-Drive Diver vs Timex Marlin Automatic 40mm
Citizen's diver meets Timex's timepiece
Citizen Promaster Sea Eco-Drive Diver vs Tissot Chemin des Tourelles Powermatic 80
Citizen's diver meets Tissot's dress watch
Citizen Promaster Sea Eco-Drive Diver vs Tissot Seastar 1000 Automatic
Two divers compared — $290 vs $515
Citizen Promaster Sea Eco-Drive Diver vs Zenith Chronomaster El Primero
Citizen's diver meets Zenith's chronograph