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  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
  • Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs
Seiko

Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs

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Marine Master Black Series Professional 300M Ref. SBDX033 / SLA035J1 - Ltd Ed 600pcs

Prospex for Seiko means “Professional Specification” that their timepieces in this category are built with very high standards to be used by professionals. One that stands out to collectors around the world and known for one of great value for money Japanese Domestic Model(JDM) is the latest in their scuba diver series; the Sumo collection. Today, we would like to introduce to you Seiko’s Black Series, the second edition after the 2017 release, while this round includes a full black Marinemaster 300 for the first time.

The Black Series is famed for their black-on-black colour, along with the MM300 ethos and a bright red second hand. The SBDX033 nicknamed by the Seiko community as “Black Series MM300,” featuring their most coveted “GS” 8L35 automatic movement derived from the 9S55, and limited to 600 pieces worldwide.

Seiko Marine Master Black Series Professional 300M Ref. SBDX033 - Ltd Ed 600pcs

A little more on it's history, Seiko continued their development for a more robust diver’s watch, and in 1968 they announced the highly regarded ref. 6159-7001. This watch was a significant upgrade; with a massive mono block case that gives it a 300m water resistant, and also a Hi-beat Seiko caliber that allows it to be the first in the market back then. This is the exact same watch that the new black dial and bezel the new MM300 Black is based on.

The Seiko Marine Master Black Series Pro. Diver Ref. SLA035J1 / SBDX033 is the successor of the highly acclaimed MM300 SBDX017, and an alternative to the current SLA021 / SBDX023 which was recently launched also with some much needed upgrades to keep it current. Overall, the new  blue MM300 still retains the massive mono block case at 44.3mm with a height of 15.4mm. It retains the familiar refined angular lugs that is polished and for the first time ever, an all-black PVD case throughout. The finishing is still done typically using Seiko's traditional Zaratsu polishing method that is seen mainly on the Grand Seiko line, which creates a distortion-free mirror finish even when its blackout. The 300m water resistant case is treated with Seiko’s DiaShield coating on the case. This provides scratch-protection and extra corrosion resistance.
 

Zaratsu finishing on monoblock case

The Ref. SLA035J1 / SBDX033 features a high grade Seiko 26-jewel automatic, caliber 8L35, which is an undecorated and unadjusted version of the Grand Seiko movement, caliber 9S55. The 8L35 beats at 28,800 bph and has handwinding and hacking features. The movement has a 50 hours of power reserve with an expected accuracy tolerance of -10/+15 seconds per day.

The dial color theme of the new MM300 is as eccentric as it goes with its case. The whole dial and bezel are finished off in monochromatic black color tone, while the main face has additional red secondary hand and “300m” text at the bottom. Seiko applied the red tone on purpose which sets out to reminds one of red colour will be eliminated when submerged into the ocean beyond 5 meters, allowing the wearer to focus on all the necessary information, allowing instantaneous reading. Other than that, The Black Series MM300 has kept the aesthetic of its dial, markers and handset found on the 6159.

The unidirectional bezel is made up of zirconia ceramic insert for the first time. Even better, the 12 o’clock triangle and the first 20 minutes markers (in 5 minutes increment) are all filled with Seiko’s proprietary Lumibrite luminescence that glows green. The bezel is raised with a coin-edge profile for easy operation. The Seiko’s signature screw-in crown at 4 o’clock.
 

Undecorated Grand Seiko movement, 8L35.

Another new upgrade to the Seiko Marine Master Black Series Pro. Diver Ref. SLA035J1 / SBDX033 is the use of sapphire crystal with anti-reflective coating on the inside now. This is probably the most requested feature since the SBDX001 and finally answered by Seiko. It not only gives the watch the much needed scratch resistance but also improved clarity as compared to the hardlex used in the older models.
 
The Black Series MM300 comes on a matching black archoddion silicon rubber strap compliments the watch beautifully, giving this new Black MM300 a seamless look and feel.
 

Seiko's LumiBrite

The  Seiko Marine Master Black Series Pro. Diver Ref. SLA035J1 / SBDX033 will certainly be one of Seiko's most iconic and chic model following the success of the SBDX001 and SBDX017, that has the finishing and movement of the Grand Seiko inside out.

It is destined to be a collector's item like its predecessors, besides its an all-black MM300. Furthermore, limited to 600 pieces, the SLA035J1 / SBDX033 is ultra sexy while it stays faithful to Seiko’s first Hi-beat dive watch in terms of design and know-how, with a slight twist of color that is still based on the Japanese heritage. Seiko nailed this one, a true collector’s dive watch with a strong pedigree in its heritage and overall built.

Specifications

icon-maker
Maker
Seiko Japan
icon-movement
Movement
Caliber 8L35. Seiko 26-Jewel Automatic.
icon-accuracy_range
Accuracy range
+15/-10 sec per day
icon-dial
Dial
Matte black with applied luminous indexes
icon-luminous
Luminous
Lumibrite
icon-case
Case
Stainless steel (hard coating)
icon-crown_type
Crown type
Screwdown
icon-lug_width
Lug width
20mm
icon-crystal
Crystal material
Sapphire crystal with anti-reflective coating on inner surface
icon-strap
Strap
Seiko's black silicon strap
icon-water_resistance
Water resistance
300m
icon-dimensions
Dimensions
44.3mm in diameter, 50.5mm lug to lug, 15.4mm thick