The Seiko Prospex SPB511 is a 60th-anniversary limited edition of the 1965 Heritage Diver’s Watch, distinguished by a silver patterned dial and gray unidirectional bezel. Seiko specifies a 40 mm case, automatic 6R55 movement with approximately 72 hours of power reserve, and 300 m water resistance; its US product page lists a price of $1,400.
Seiko announced a worldwide production run of 6,000 pieces, with availability at its boutiques and select retailers planned from June 2025. That launch plan does not confirm current stock. The SPB511’s strongest distinction is its anniversary design and edition status, rather than a claim of a radically new watch platform.
Seiko SPB511 specifications at a glance
| Specification | Seiko Prospex SPB511 |
|---|---|
| Collection | Prospex 1965 Heritage Diver’s Watch |
| Edition | Seiko Diver’s Watch 60th Anniversary Limited Edition; 6,000 pieces worldwide |
| US price | $1,400 on Seiko’s US product page; Seiko’s March 2025 release also gave $1,400 as the recommended retail price at publication |
| Case dimensions | 40.0 mm diameter; 13.0 mm thickness; 46.4 mm length |
| Case and bracelet | Stainless steel with super-hard coating |
| Crystal | Curved sapphire with anti-reflective coating on the inner surface |
| Dial and bezel | Silver patterned dial; gray unidirectional rotating elapsed-time bezel |
| Movement | Automatic caliber 6R55; manual winding; 24 jewels; 21,600 vibrations per hour |
| Power reserve | Approximately 72 hours |
| Water resistance | 300 m (1,000 feet); Seiko describes it as suitable for scuba diving |
| Bracelet clasp | Tri-fold push-button release with secure lock and slide adjuster; 15 mm range in six 2.5 mm increments |
Design and anniversary context
Seiko’s March 2025 announcement places the SPB511 among three Prospex creations marking 60 years since the company’s first diver’s watch in 1965. Seiko says the silver-dialed model pays homage to that original watch. The company identifies the original as the model known to fans as the 62MAS and describes it as an automatic mechanical watch with 150 m water resistance.
The SPB511’s silver patterned dial is inspired by Seiko’s wave mark, which the company associates with the casebacks of its diver watches. Seiko says LumiBrite is applied to the hands and all 12 markers. The gray elapsed-time bezel rotates unidirectionally. The case back carries a limited-edition serial number, according to Seiko’s product information.
#1 Best Overall
- SEIKO WATCH – Seiko SRPL15 Prospex wristwatch.
- COLLECTION – Prospex design.
- CASE DESIGN – Prospex Mare model format.
- MODEL REFERENCE – SRPL15 identifies the specific model.
- WATCH DIAMETER – 41.7 mm.
Movement and performance specifications
The automatic caliber 6R55 also supports manual winding and has 24 jewels. Seiko specifies a frequency of 21,600 vibrations per hour and an approximately 72-hour power reserve. These are manufacturer specifications, not the result of an independent timing or power-reserve test.
Seiko specifies 300 m water resistance and describes the model as suitable for scuba diving. That rating is a published product specification; it does not establish the pressure-test condition of an individual watch. No independent pressure test or hands-on dive evaluation was established in the research for this article.
What the clasp adjustment offers
Seiko describes an updated slide-adjustment clasp with a 15 mm adjustment range divided into six 2.5 mm increments. The design gives the wearer several adjustment positions without changing bracelet links. The stated range describes the clasp feature; it does not establish that the bracelet will fit every wrist or suit every use.
Rank #2
- KHAKI GREEN DIAL: this rugged sports watch features a khaki green dial patterned to mirror the shape of the bezel’s edge, with Lumibrite dial indicator hands and markers for low light and a magnified day/date calendar
- BLACK BEZEL: this versatile men’s watch features a black ceramic unidirectional bezel with distinctive scalloped edging, for elapsed timing
- AUTOMATIC & MANUAL: SRPE05 automatic watches for men power up with your natural movements, and feature the ability to wind manually, with 41 hours of reserve power
- WATER-RESISTANT: these rugged stainless steel dive watches for men feature a khaki green silicon strap, and are both stylish and robust, following ISO standards for scuba, and are water-resistant to 200 meters
- 4R36 CALIBER: equipped with the reliable 4R36 caliber, these precise men’s wrist watches ensure the most accurate timekeeping
Price and availability
Seiko’s US product page displays a price of $1,400. Seiko’s March 2025 announcement also stated a $1,400 US recommended retail price at publication. The 2025 release planned availability at Seiko boutiques and select retail stores from June 2025; that launch information is not confirmation of stock in October 2026 or in any particular market.
Check Seiko’s official website and store locator for current product information and authorized sales channels. Confirm the reference, local price, availability, warranty documentation, and seller terms directly before buying.
How does the SPB511 differ from other 1965 Heritage Divers?
The dossier establishes the SPB511’s own specifications and anniversary design but does not establish a full comparison with regular-production 1965 Heritage Diver references. Seiko identifies the silver patterned dial, gray bezel, and limited-edition serial number as features of this anniversary model. Avoid assuming that another reference shares or lacks a particular specification without checking its current product information.
Rank #3
- WATER-RESISTANT: these water-resistant men's dive watches are ISO scuba-approved to depths of 200 meters
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL: features a durable 43.8mm stainless steel watch case and bracelet.
- LUMIBRITE DISPLAY: this men's automatic watch features a highly-legible display with LumiBrite hands and markers
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
| Aspect | SPB511 information established by Seiko |
|---|---|
| Design | Silver patterned dial and gray unidirectional bezel |
| Edition | 60th-anniversary limited edition; 6,000 pieces worldwide |
| Movement | Automatic caliber 6R55 |
| Power reserve and water resistance | Approximately 72 hours; 300 m |
| Clasp adjustment | 15 mm range in six 2.5 mm increments |
FAQ
Is the Seiko SPB511 a limited edition?
Yes. Seiko announced 6,000 pieces worldwide as a Seiko Diver’s Watch 60th Anniversary Limited Edition.
How much is the Seiko Prospex SPB511?
Seiko’s US product page displays $1,400. Seiko’s March 2025 release also gave $1,400 as the US recommended retail price at publication. Prices in other markets and current retailer prices may differ.
What are the Seiko SPB511’s main specifications?
Seiko specifies a 40.0 mm diameter, 13.0 mm thickness, 46.4 mm case length, automatic caliber 6R55, approximately 72-hour power reserve, curved sapphire crystal, and 300 m water resistance.
Rank #4
- STAINLESS STEEL CASE built to endure with style, making this watch your perfect daily companion
- AUTOMATIC MOVEMENT for seamless precision in every tick of this watch
- SCRATCH-RESISTANT CRYSTAL to maintain a pristine look even with daily wear and tear on your watch
- LUMINESCENT HANDS for effortless readability in low-light conditions, ensuring you never miss a moment with this watch
- WATER RESISTANT DESIGN ensuring your watch is ready for any adventure, rain or shine
How does the SPB511 differ from the regular 1965 Heritage Diver?
The SPB511 has a silver patterned dial, gray bezel, and anniversary limited-edition serial number. A complete comparison with regular-production references is not established by the sources used here, so check Seiko’s current specifications for each reference before comparing them.
Is the SPB511 suitable for scuba diving?
Seiko specifies 300 m water resistance and describes the watch as suitable for scuba diving. That is the manufacturer’s specification, not an independent test of an individual watch.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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