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Seiko Prospex - March 2020 Limited Editions Announced

Seiko Prospex SLA037J1 SLA039J1 SLA041J1

Three re-creations that combine heritage and evolution

55 years ago, Seiko introduced its, and Japan’s, first ever diver’s watch. With an automatic movement and water resistance to 150m, it proved its reliability when it was used by members of the Japanese Antarctic Research Expedition from 1966 to 1969. In the years that followed, Seiko created many other diver’s watches that found favour with professional divers and adventurers alike, thanks to their high quality and reliability.

Three of the most important landmarks from Seiko’s first decade as a maker of diver’s watches are now re-created in celebration of the 55th anniversary of that first achievement. They are offered in the Prospex collection which is today synonymous with excellence in watches for use in all types of sports and challenging environments.

Pushing back the boundaries in diver’s watches, 1965-1975. 

Although proud that their watch had proved itself in the Antarctic, Seiko’s engineers continued their development work to better meet the needs of the professional diver. This is why, in 1968, Seiko’s first diver’s watch with 300m water resistance and a 10-beat automatic movement was created. It was used successfully by the first person from Japan to climb Mt. Everest but this achievement was, at least partially, eclipsed by the receipt that same year of a letter from a professional diver who quietly asserted that no diver’s watch yet created could withstand the conditions that were his everyday reality in his job as a saturation diver. The Seiko team realized that nothing less than a technical step-change was needed to create a diver’s watch that could truly be called ‘professional’. It took seven years but, at last, in 1975, Seiko produced a 600m diver’s watch that pushed back the boundaries further than perhaps any other diver’s watch in history. It had a titanium one-piece case and an outer case protector. It used a specially developed L-shaped gasket to make it impervious to helium without the need for an escape valve. It had an accordion-style strap that made the watch secure on the wrist whatever the ambient pressure. This unique watch changed forever the world’s expectation of what a diver’s watch could deliver and its unique construction and popularity led to it being given the name “Tuna” by watch fans across the world.

Three Seiko diver’s watches that made history: 
1968 Hi-beat Diver’s 300m, 1965 62MAS 150m, 1975 Professional Diver’s 600m

Seiko’s Ever-Brilliant Steel: the world’s most corrosion resistant steel, perfectly suited for a diver’s watch for deep sea use.

Seiko Prospex SLA037J1

The watch case of the 1965 re-creation utilizes a new grade of stainless steel

While faithful to the original designs, all three watches are fully up to date in their specifications and execution. The greatest advance is in the grade of stainless steel used in the construction of the three watches. To be known as Seiko’s “Ever-Brilliant Steel,” thanks to the brilliant white hue that gives this trilogy of watches its unique look, this grade of steel is more corrosion resistant than that which is used in most high-end watches today.* It is used for the first time** in the watch industry for the cases of the 1965 and 1968 re-creations and the bezel of the 1975 re-creation whose case is, like the original, in titanium. This material is used extensively in the surfaces, linings, bolts and other components of marine structures and vessels so as to avoid corrosion in a chloride-rich environment such as sea water. It presents many challenges in the manufacture of watch cases but, thanks to the experience and innovative techniques of the Seiko team, these challenges were overcome and Ever-Brilliant Steel is now set to bring a new level of durability to the diver’s watch. 

The 1965 and 1968 re-creations are powered by the high beat 8L55 movement and the 1975 re-creation carries Caliber 8L35, both developed and assembled expressly for diver’s watches at the Shizukuishi Watch Studio. All three have sapphire crystals with anti-reflective coating on the inner surface. The 1975 re-creation has an increased anti-magnetic resistance of 40,000 a/m thanks to the dial made of pure iron.

  • * This stainless steel has a PREN (Pitting Resistance Equivalent Number) value 1.7 times higher than that of the grade of steel used in most high-end watches. PREN is a widely accepted standard used to measure corrosion resistance. 
  • ** as of December 2019, based on Seiko’s research.

Designs that capture the beauty and mystery of the deep sea 

All three re-creations share the same blue-gray dial that reflects the beauty of the sea but also hints at their ability to perform at depths which dim the intensity of the oceans’ blue. In particular, the subtle gradation of the dial color on the 1965 and 1968 re-creations dramatizes the way that light gradually fades as one dives deeper into the dark, mysterious world of the ocean.

Seiko Prospex SLA039J1

The dials celebrate the beauty and mystery of the ocean depths

The straps also pay homage to the originals while being modern in both the material used and their color. The rubber strap with a fabric-like texture of the 62MAS from 1965 is reproduced in silicone for greater strength and comfort. The strap on the 1968 re-creation is also in silicone and has the same pyramid pattern as its predecessor and the 1975 professional diver’s re-creation comes with the signature accordion-type strap. 

All three watches will be made available as limited editions of 1,100 at Seiko boutiques and selected retailers worldwide . The 1965, 1968, and 1975 re-creations will be introduced in June, July, and August 2020 respectively.

A special commemorative box with all three re-creations with
additional black straps will be available in June 2020. Just 100 sets will be released.

View Set

A new contemporary version of the 62MAS

Seiko Prospex SPB149J1

 

In addition to the limited edition trilogy, the 55th anniversary of Seiko’s first diver’s watch is also celebrated with an all-stainless steel modern re-interpretation. This new version is characterized by its slim profile and a lowered center of gravity that makes it comfortable to wear on even a smaller wrist. It features the same special 55th anniversary blue-gray dial as graces the trilogy and comes with both a stainless steel bracelet and a silicone strap. It is powered by Caliber 6R35 that delivers a power reserve of 70 hours. It will be available in a limited edition of 5,500 at Seiko boutiques and selected retailers worldwide from June 2020. 

Seiko Diver’s Watch 55th Anniversary Limited Editions 

The 1965 Diver’s Re-creation 

Seiko Prospex SLA037J1

SLA037

View Watch

Caliber 8L55
Driving system: Automatic
Vibrations: 36,000 vibrations per hour (10 beats per second)
Power reserve: 55 hours
Number of jewels: 37

Specifications
Ever-Brilliant Steel case
Box shape sapphire crystal with anti-reflective coating on the inner surface
Screw-down crown, screw case back
LumiBrite on hands and indexes
Water resistance: 200m diver’s
Magnetic resistance: 4,800 A/m
Diameter 39.9mm, Thickness: 14.7mm
Silicone strap
Limited Edition of 1,100

The 1968 Professional Diver’s 300m Re-creation 

Seiko Prospex SLA039J1

SLA039

View Watch

Caliber 8L55
 Driving system: Automatic
 Vibrations: 36,000 vibrations per hour (10 beats per second)
 Power reserve: 55 hours
 Number of jewels: 37

Specifications
 Ever-Brilliant Steel case
 Dual-curved sapphire crystal with anti-reflective coating on the inner surface
 LumiBrite on hands and indexes
 Water resistance: 300m saturation diver’s
 Magnetic resistance: 4,800 A/m
 Diameter: 44.8mm, Thickness: 15.7mm
 Silicone strap
Limited edition of 1,100

The 1975 Professional Diver’s 600m Re-creation 

Seiko Prospex SLA041J1

SLA041

Caliber 8L35
 Driving system: Automatic
 Vibrations: 28,800 vibrations per hour (8 beats per second)
 Power reserve: 50 hours
 Number of jewels: 26

Specifications
 Titanium inner case (super hard coating) with Ever-Brilliant Steel bezel
 Sapphire crystal
 LumiBrite on hands and indexes
 Water resistance: 1000m saturation diver’s
 Magnetic resistance: 40,000 A/m
 Diameter 52.4mm, Thickness: 17.2mm
 Silicone strap
Limited edition of 1,100

1965 Diver’s Modern Re-interpretation

Seiko Prospex SPB149J1

SPB149

Caliber 6R35
 Driving system: Automatic
 Vibrations: 21,600 vibrations per hour (6 beats per second)
 Power reserve: 70 hours
 Number of jewels: 24

Specifications
 Stainless steel case and bracelet with super-hard coating
 Curved sapphire crystal with anti-reflective coating
 Screw-down crown, screw case back
 Lumibrite on hands and indexes
 Water resistance: 200m diver’s
 Magnetic resistance: 4,800 A/m
 Diameter 40.5mm, Thickness: 13.2mm
 Stainless steel bracelet with three-fold clasp with push button release,
 secure lock and extender, with a silicone strap included
Limited edition of 5,500

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