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Seiko Prospex SLA021J1 Master Marine, Boxed 880615


Ref. No. | Item No. | 802089

The Seiko Prospex SLA 021J1 Marine Master Professional continues Seiko’s rich dive watch history. It is aesthetically designed to resemble earlier models, but with subtle updates such as a ceramic bezel and sapphire crystal, along with a 300-meter water resistance rating.




$2,395

Description

The Seiko Prospex SLA 021J1 Marine Master Professional continues Seiko’s rich dive watch history. It is aesthetically designed to resemble earlier models, but with subtle updates such as a ceramic bezel and sapphire crystal, along with a 300-meter water resistance rating.

The History:

Seiko first entered the dive watch market in the 1960s, after a request from a local diver to build something that could hold up during deep-sea dives using diving capsule & saturation techniques. His complaint was that upon reaching greater depths, most watches would malfunction and become damaged. The answer to this request was for Seiko to establish a development team to design a timepiece that could perform reliably under the extreme conditions of deep-sea diving, and they did so magnificently.

The Watch:

One of the most notable characteristics of the Prospex SLA 021J1 is the case. The monoblock case is just 2 pieces, the stainless steel case, and the bezel. There is no case back. The case is polished using the Zaratsu Polishing Technique, which is a mirror blade polishing technique performed at the Grand Seiko manufacturing facility. The case is then treated with Seiko’s DiaShield coating to prevent scratches during wear. The crystal is sapphire and the movement is a Caliber 8L35B movement, which is based on Grand Seiko’s 9S55 movement. The dial is black with brushed metal hands, that are filled with Seiko’s own Lumibrite luminescence composition, as are the number plots and the first 20 markers on the bezel.

The Details:

This Seiko Prospex SLA 021J1 Marine Master Professional is in very good condition. The case and crystal are in excellent condition and the stainless steel bracelet has slight wear marks, visible in photos. This timepiece also has the factory rubber strap, as well as box and manufacturer booklet and tag.

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Additional Info

  • Manufacturer
  • Model/Case Ref. No
  • Case Material
  • Crystal
  • Bezel
  • Crown
  • Movement Type
  • Case Size
  • Lug Width
  • Case Height
  • Seiko
  • Prospex SLA 021J1 Marine Master Professional
  • Stainless Steel
  • Sapphire
  • Unidirectional
  • Screw down
  • Seiko Caliber 8L35
  • 43mm
  • 20mm
  • 15.4mm

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