The Seiko Prospex SLA061J1 is a 1,000-piece Black Series reinterpretation of Seiko’s 1970 mechanical diver, released in March 2022. It pairs a 44mm hard-coated steel case and Caliber 8L35 with a black-and-orange design, a five-row steel bracelet, and an extra silicone strap. Seiko’s published specifications answer what the watch is; they do not establish current stock or price, and this is not a first-person wear or performance review.
What the SLA061J1 is
Seiko identifies the model as SLA061; SLA061J1 is the reference used in the US specification result. It belongs to the Prospex Black Series and reinterprets the brand’s 1970 diver. Seiko announced a limited run of 1,000 pieces, with availability beginning in March 2022. The official Black Series page describes the design and release details at Seiko’s Black Series page.
The design retains the older diver’s flowing case shape and asymmetrical protection around the crown at four o’clock. Seiko says the black finish evokes the darkness and silence of the night ocean, while orange represents lights illuminating it. The textured dial is intended to recall sand on the seabed; the orange seconds hand carries the color accent onto the dial.
Seiko also attributes a notable piece of the 1970 diver’s history to adventurer Naomi Uemura: its Black Series page says he wore the original during a 12,000km solo dog-sled journey from Greenland to Alaska between 1974 and 1976. That is Seiko’s account of the watch’s history.
#1 Best Overall
- 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
SLA061J1 specifications
| Specification | Seiko Prospex SLA061J1 |
|---|---|
| Reference | SLA061 / SLA061J1 |
| Movement | Automatic with manual winding, Caliber 8L35; 26 jewels |
| Power reserve | Approximately 50 hours |
| Frequency | 28,800 vibrations per hour (8 beats per second) |
| Stated precision | +15 to -10 seconds per day |
| Case | Hard-coated stainless steel; 44.0mm diameter, 13.0mm thick, 49.3mm lug-to-lug |
| Crystal | Curved sapphire with anti-reflective coating on the inner surface |
| Water resistance | 200m / 660ft diver’s |
| Weight | 185g |
| Bezel and crown | Unidirectional rotating bezel; screw-down crown |
| Display and functions | Date; stop-seconds |
| Bracelet and additional strap | Five-row steel bracelet; additional black silicone strap included |
| Edition | 1,000 pieces; availability began March 2022 |
These are Seiko’s listed specifications, also reproduced in Monochrome’s dated 2022 launch coverage. The stated precision is a manufacturer specification, not a result from a test of an individual watch. Seiko says Caliber 8L35 was designed for diver’s watches by watchmakers at Shizukuishi Watch Studio in northern Japan.
How it compares with the SPB257 Black Series diver
The SLA061 sits above the related SPB Black Series model in Seiko’s lineup on paper: it uses the 8L35 movement, while the SPB trio uses the 6R35. The larger case dimensions and smaller limited run also distinguish the SLA061. The comparison below uses Seiko’s published information; it is not a side-by-side wear test.
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
| Attribute | SLA061 | SPB Black Series trio |
|---|---|---|
| Movement | Caliber 8L35 | Caliber 6R35 |
| Case dimensions | 44.0mm diameter; 13.0mm thick; 49.3mm lug-to-lug | Not stated in the cited Black Series information |
| Edition size | 1,000 pieces | 5,500 pieces |
| Case and strap setup | Hard-coated stainless steel; five-row steel bracelet plus black silicone strap | Not stated in the cited Black Series information |
| Launch price | Monochrome reported EUR 3,300 in 2022 | Not stated in the cited sources |
Monochrome’s launch article characterized the SLA061 as the higher-end SLA model in that Black Series group. Its EUR 3,300 figure is a reported 2022 launch price, not a current asking price. Seiko’s official US result displayed USD 3,300, but that is a regional listing figure rather than a verified current transaction quote.
Strap compatibility: heed Seiko’s warning
The watch comes with a five-row steel bracelet and an additional black silicone strap. Seiko specifically cautions against fitting a fabric-type strap, stating: “If you attach a fabric type strap to this model, the spring bar may come off due to its structure, and it may not be not possible to replace it.” The warning is tied to the case’s structure; do not assume a fabric strap is compatible or interchangeable.
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Rank #3
- 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
Can you still buy the SLA061J1?
The watch was announced for March 2022 as a limited edition of 1,000 pieces. Those facts establish its original release, not current availability. The cited sources do not verify present-day stock, a live dealer listing, or a current market price. Check with Seiko-authorized retailers or reputable pre-owned sellers for availability, and confirm the exact reference, condition, included bracelet and silicone strap, and documentation before buying.
Monochrome’s October 2, 2022 launch coverage is useful for historical context and the launch-price report, but it is not a current stock report. Seiko’s official US specification result identifies SLA061/SLA061J1, although its product URL was not accessible when checked for this article; use Seiko’s official channels or a dealer to verify current product information.
Rank #4
- 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.
What this specification-based review can—and cannot—tell you
The published figures describe a substantial 44mm case, a 185g watch, and a 49.3mm lug-to-lug span. Those measurements are more useful for estimating fit than the heritage description alone, but wrist shape and personal preference still determine how it wears. No hands-on comfort assessment, finishing evaluation, lume observation, or timing test is established here. The stated accuracy range should therefore be read as Seiko’s specification rather than a guarantee of an individual example’s daily rate.
Quick Recap
Best Value
- 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.
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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