Seiko Prospex SPB239 and SPB237 Divers
New Release

Seiko Prospex SPB239 and SPB237 Divers

By cazalea · May 26, 2021 · 11 replies
cazalea
WPS member · Seiko forum
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Cazalea introduces Seiko's modern reinterpretations of their 1965 and 1970 dive watches, highlighting a significant innovation: Seiko's first woven fabric straps designed for saltwater use. This post delves into the unique Japanese aesthetic and enhanced durability of these new straps, alongside the specifications of the two new Prospex models, the SPB239 and SPB237.

New from Seiko — the company’s reinterpretation of popular dive watches from 1965 and 1970, showcasing the first woven fabric straps developed by Seiko for salt water use.




Each watch comes with two straps - the color choices are brown, green, gray and tan.



The polyester fibers are woven based on traditional Japanese patterns, and the straps are much thicker and more open in character than a typical nylon NATO strap. The hardware is also specific to this model series.



The fabric straps incorporate a traditional braiding technique called Seichu. Their texture and color complexion are familiar in Japanese culture for their use in fabric designs, as seen in a traditional “obijime,” the decorative cord that holds a Kimono sash in its place. The straps present a uniquely Japanese aesthetic and texture and are specially manufactured to have a tensile strength nearly four times that of regular Seiko fabric straps. 

Their strength and resistance to degradation caused by exposure to sunlight, meet the demanding standards of Seiko’s diver’s watches and are perfect for use under water. In addition, thanks to its unique braiding pattern, the straps have the flexibility and air permeability that ensure maximum comfort on the wrist.



Both watches share the same design and specifications as the 1965 and 1970 modern re-interpretations introduced last year in celebration of the 55th anniversary of Seiko’s first diver’s watch. 

The brown dial and bezel of the 1965 re-interpretation and the textured gray dial of the 1970 re-interpretation perfectly harmonize with the earth color tones of their fabric straps. Both creations are offered with an alternative fabric strap of a different color that can easily be interchanged without any tools, thanks to the watch’s strap structure





These watches are powered by the Caliber 6R35 that delivers a power reserve of 70 hours. They are 200m water resistant. The curved sapphire crystals are treated with an antireflective coating on the inner surface, and the indexes, hour, minute and seconds hands are coated with Lumibrite of a specially faded vintage color matching the earthy tones of the dial and straps.

Both watches will become part of the mainstream Prospex collection. 

The 1965 re-interpretation and the 1970 re-interpretation will be available at Seiko Boutiques and retail partners worldwide in June and July 2021.


Seiko Prospex 1965 Diver’s Modern Re-interpretation: SPB239



Seiko Prospex 1970 Diver’s Modern Re-interpretation: SPB237



Movement
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 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

Dimensions
Diameter: 40.5mm, Thickness: 13.2mm (SPB239)
Diameter: 42.7mm, Thickness: 13.2mm (SPB237)
Polyester strap with additional polyester strap included

Pricing
In Europe: €1,250 (SPB239) and €1,350 (SPB237)

Key Points from the Discussion

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The Discussion
VI
VinnieD
May 26, 2021

I am tempted by the Willard!

PA
PalmSprings
May 26, 2021

They look exactly the same as the previous releases?

VI
VinnieD
May 26, 2021

You need to dig a little deeper to identify the differences. Seiko has started to play this game recently, potentially generating the ire of customers who bought expensive limited editions, only to see very similar wider public editions released a year later for much less money (and generally with a lesser movement)

PA
PalmSprings
May 26, 2021

I was actually looking at them yesterday so they're fresh in my mind. I don't understand them why they make them so similar, barely any difference in colour. I actually had a dream about the Willard diver, but with a white dial. They should just do that.

EC
Echi
May 26, 2021

I’m waiting for them to come out with a “proper” prospex version of the willard following the dimensions of the reissue. I wonder if they ever will. The current ones don’t have the same case profile and wears different. I was almost sure i’d get one up until i tried the green one in the store. Comfortable for sure but didn’t look right on my wrist.

CA
cazalea
May 26, 2021

So I suppose you might look at it as a test marketing effort to sell straps, using watches that are already "in the market" in a variety of flavors. Each watch comes with two straps -- I have reworked the article now with high-res images from their press site and some more text; I didn't have access to it earlier. Here is the special page for this introduction if you care to go there and check it out SEIKO FABRIC STRAP DIVERS Cheers, Cazalea

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