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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsThe Seiko SLA019J1 is a 1,968-piece Prospex diver with a green dial and bezel, a 44.3 mm steel case, and 300 m saturation-diving water resistance. Seiko’s official name is the “Seiko Prospex The 1968 Automatic Diver’s Commemorative Limited Edition” (SLA019); “Marinemaster” is common specialist shorthand, not part of the official model name. The specifications below follow Seiko’s product page, while design and wearing observations are attributed to Fratello’s Robert-Jan Broer, who wrote about the watch on June 4, 2018.
What the SLA019J1 is—and what “Marinemaster” means
Seiko presents the watch as a limited-edition commemoration of its 1968 diver. Fratello’s Robert-Jan Broer places it in the Marinemaster 300 lineage and notes its connection to Seiko reference 6159, but says it is not officially named a Marinemaster. That distinction matters when identifying the watch: SLA019 is Seiko’s product-page reference, while SLA019J1 and “Marinemaster” are familiar specialist and search terms.
Seiko specifies an edition of 1,968 pieces. Its current Marinemaster collection page covers newer references SLA077 and SLA079; those are separate models, not alternative names for the SLA019J1.
Specifications at a glance
| Specification | Seiko SLA019 |
|---|---|
| Case | Stainless steel with super-hard coating |
| Diameter and thickness | 44.3 mm diameter; 15.4 mm thick |
| Lug width | 20 mm |
| Crystal | Sapphire with inner anti-reflective coating |
| Movement | Seiko caliber 8L35; automatic with manual winding |
| Accuracy | +15 to −10 seconds per day, as specified by Seiko |
| Power reserve | Approximately 50 hours |
| Other movement details | 26 jewels; 28,800 vibrations per hour (8 beats per second); stop-seconds; date display |
| Water resistance | 300 m / 1,000 ft for saturation diving |
| Edition | Limited to 1,968 pieces |
Seiko also lists Lumibrite on the hands and indices, a unidirectional rotating bezel, a screw-down crown, limited-edition marking, and an engraved serial number on the caseback. The official specifications do not state the bezel material.
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- 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
What changed from the SBDX017
In his 2018 comparison with the earlier Marinemaster 300 SBDX017, Broer identifies sapphire crystal and a ceramic bezel as notable changes; he describes the earlier watch as having a metal bezel. He also calls the green dial and bezel the most visible difference. These are details from his account rather than wording in Seiko’s official specification list.
Broer reports that the green color was inspired by Yakushima Island and its Japanese cedar forests. He describes the watch as retaining the 44.3 mm case size. His article calls the movement 8L35B, whereas Seiko’s product page specifies 8L35. The sources do not establish whether the difference reflects a naming nuance or an error, so Seiko’s listed 8L35 is the clearest reference for the official specification.
Rank #2
- 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 the 1968 heritage fits
Seiko’s history of the 1968 diver says it arrived three years after the company’s first diver and combined 300 m water resistance with a high-precision, 10-beat automatic movement, one-piece case construction, a screw-down crown, and a unidirectional bezel. Seiko describes the current Marinemaster collection as a reinterpretation of that 1968 design. This is heritage context, not evidence that every construction detail of the earlier watch carries over to the SLA019J1.
Bracelet and strap observations
Broer reports that the SLA019J1 came with a stainless-steel bracelet and a silicone strap. He found the bracelet clasp’s extension behavior annoying while opening it, but said it was not a problem when the watch was worn. That is one reviewer’s observation, not evidence of a universal defect. Seiko lists a 20 mm lug width; check fit and compatibility before choosing a replacement strap.
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Rank #3
- AUTOMATIC MOVEMENT: Seiko 4R35 automatic movement includes manual winding, 23 jewels, date display, stop-second function, and approximately 41 hours of power reserve.
- 200M DIVER'S WATER RESISTANCE: Rated to 200 meters / 660 feet for diving, with a screw-down crown and screw case back.
- STAINLESS-STEEL CASE: 41.7mm stainless-steel case measures 12.3mm thick with a 49.5mm lug-to-lug distance and 20mm lug width.
- HARDLEX CRYSTAL: Durable Hardlex crystal protects the dial, while LumiBrite on the hands, indexes, and bezel improves low-light visibility.
- DIVER-READY DESIGN: Unidirectional rotating bezel and three-fold clasp with secure lock, push-button release, and extender provide practical functionality.
Price and availability
Fratello reported a €3,200 retail price in its 2018 article. That is launch-era context, not a current asking price. Current stock and market pricing have not been verified, so the figure should not be used as a present-day valuation.
Quick Recap
Best Value
- PADI SPECIAL EDITION: Men's Prospex Sea diver featuring a PADI Special Edition design with a stainless-steel case and ceramic bezel display.
- AUTOMATIC MOVEMENT: Seiko 4R36 automatic movement offers manual winding, 24 jewels, day/date display, stop-second function, and approximately 41 hours of power reserve.
- 200M DIVER'S WATER RESISTANCE: Rated to 200 meters / 660 feet for diving, with a screw-down crown and screw case back.
- SAPPHIRE CRYSTAL: Sapphire crystal with magnifier and inner anti-reflective coating provides durable dial protection and improved readability.
- DIVER-READY FEATURES: 45mm stainless-steel case, unidirectional rotating bezel, LumiBrite hands, indexes and bezel, plus a secure three-fold clasp with extender.
Rank #4
- PADI SPECIAL EDITION: Men's Prospex Sea diver watch features PADI Special Edition details and a durable stainless-steel case.
- AUTOMATIC MOVEMENT: Seiko 4R35 automatic movement with manual winding, 23 jewels, stop-second function, date display, and approximately 41-hour power reserve.
- 200M DIVER'S WATCH: 200m/660ft diver's water resistance, screw-down crown, and screw case back support underwater use.
- SAPPHIRE CRYSTAL: Sapphire crystal with magnifier and inner anti-reflective coating provides enhanced clarity and scratch resistance.
- CERAMIC BEZEL & SILICONE BAND: Stainless-steel bezel with ceramic display and unidirectional rotation pairs with a flexible silicone band.
Sources
- Seiko Watch Corporation: SLA019 product specifications
- Robert-Jan Broer, Fratello Watches, “Hands-On With The Seiko SLA019J1 Marinemaster,” June 4, 2018
- Seiko Watch Corporation: Marinemaster 1968 heritage diver history
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.
