Head-To-Head: Seiko Perspex Marinemaster 1000m Hi-Beat SBEX001 versus Seiko Perspex Marinemaster Professional 1000m Automatic Diver SBDX011

Technology in mechanical watches interest me immensely. One area that I follow closely is on dive watches, specifically extreme dive watches. Seiko has a number of watches that represent the best in technology. I am blessed to be able to own two of them, the 1000 meter SBEX001 (on the left of the photo below) as well as the iconic SBDX011 Emperor Tuna (on the right of the photo below).

Citizen BN0211-50E Promaster Tough Eco-Drive Black Dial Bracelet Watch - Simplicity Is Its Beauty, A Review (plus Video)

Any watch collector will have something to say about quartz watches. All would say that accuracy for quartz powered watches surpasses mechanical timepieces. Unfortunately, a lot of them also will shy away from acquiring a quartz watch due to the prevailing negative perception vis-a-vis a mechanical timepiece. Although I officially don't have such a bias view against quartz watches, the watches I acquire over the years appears to show a high degree of leaning towards mechanical timepieces. After looking at the facts and some soul searching, I came to the conclusion that my historical acquisition trail has been influenced by reviews and comments from other watch collectors.

I realised that my worldview is a reflection of the collective wants of all the watch collectors that are sharing their dreams about this hobby online. Unfortunately, this is not what I want in the hobby. For me, it is all about the design, technology and a watch's position on the evolutionary tree of watches. In the last year or so, I have started to become more inclusive and started to look further into the quartz world.

BALL Engineer Hydrocarbon DeepQUEST DM3000A-SCJ-BK - Highly Capable Swiss Extreme Diver Watch, A Review (plus Video)

This is my second BALL watch for the collection. The first was the BALL Engineer Hydrocarbon AeroGMT Reference DG2016A-SC-BK. A real hunk of a watch, well protected like a tank and a bright spark in the dark. This second piece is even hunkier with a body designed to be 10 times stronger than the AeroGMT. The BALL Engineer Hydrocarbon DeepQUEST with reference DM3000A-SCJ-BK is currently the brand's ultimate dive watch with a rated diving limit of 3,000 meters or 9,850 feet!

The technology that goes into the design and manufacturing of extreme dive watches have fascinated me ever since I started this hobby. Although I doubt that I will ever be in a position to use the capabilities of such dive watches, the desire to wear such watch is strong. To make something small immensely strong against external pressures is remarkable and this factor is what appeals to me.

The BALL Engineer Hydrocarbon DeepQUEST is a simple 3-hand watch with a date function. However, its design and manufacturing incorporates a number of cutting-edge technology developed by the BALL Watch company. BALL states quite a number of their own in-house technologies but for the DeepQUEST, the following are the notable ones used.

Seiko Prospex Diver 300m Marinemaster SLA019J1 Deep Forest Limited Edition (or SBDX021) - Desirable as a Collectable, A Review (plus Video)

I finally able to complete the mechanical set of The 1968 Mechanical Divers 50th Anniversary Commemorative Collection by Seiko.

This year, to celebrate the 50th anniversary of the 1968 hi-beat diver model 6159-7001, the first diver’s watch with a hi-beat automatic calibre, Seiko introduced three modern divers that pay homage to this icon. Up to this point I was able to collect the first and third in the series; the limited edition Prospex Diver 300m Hi-Beat SLA025 (or SBEX007) with calibre 8L55 and the Prospex Diver 200m SPB077 (or SBDC061) with calibre 6R15. Today, I finally snared the second of the series, the limited edition Prospex Diver 300m 'Marinemaster' SLA019 (or SBDX021) Deep Forest with calibre 8L35. This watch is officially known as 'The 1968 Automatic Diver's Commemorative Limited Edition'.

Originally I wasn't looking at getting the SLA019 for the collection. My view then was that it was too similar to the SBDX001 300m Marinemaster which is already a member of the collection. However, after having laid my eyes on an actual piece recently, I was taken by beauty of the dial colour and the use of zirconia ceramic for the bezel. Couple with the sapphire crystal to protect the dial, this combination is something that I have been searching for a long time in a Seiko professional dive watch.  Unfortunately, this realisation only came to me in November 2018 when examples of this limited edition timepiece were already shipped to distributors in August 2018! The likelihood of getting one appears thin as rave reviews about the watch have already flooded the internet since it was presented to the public back in Baselworld 2018 which was held in March 2018.

Seiko Perspex Marinemaster 1000m Hi-Beat SBEX001G Titanium Limited Edition (or SBEX001) - A true showcase of Seiko’s 50th year in the dive watch field, A Review

When Seiko introduced the Seiko Perspex Marinemaster 1000m Hi-Beat SBEX001G Titanium Limited Edition piece in March 2015 during Baselworld2015, I was mesmerized. A lot of innovative features were incorporated into this watch. Although its dimensions appear very formidable, I immediately got the 'have-to-have-it' feeling.


Key specifications of the watch are as follows: The watch face has a diameter measuring 48.2 mm (excluding crown). The watch case has a thickness of 19.7 mm. Made out from a single piece of titanium block, access to the internals only via the front of the watch. The machinery is the top-of-the-line Hi-Beat movement from Seiko. Water rating at 1,000 meters without the need of a helium escape valve mechanism. More details about all these later.

Since its introduction back in March 2015, I have been patiently waiting for Seiko to commence delivery. The watch is finally available for purchase. Unfortunately, there is a catch to this watch. For all its infinite wisdom, Seiko decided to make it a limited edition piece with a production run of just 700 specimens. This means the price would be a premium and very scarce to find.

Seiko Prospex 300MM SBDX001 Marinemaster - In a league of its own, A Review

This is one of my grail watches. The Seiko Prospex 300MM SBDX001 Marinemaster as been touted as the most versatile dive watches that can rival the best the Swiss industry could muster. This watch is capable on land, sea and air in all situations such as casual or even formal functions.

This watch is the only Marinemaster watch that actually says "Marinemaster" on the watch. As this is a JDM (Japan Domestic Market) watch, you can only obtain it in Japan from official dealers. Nevertheless, if you cannot make it to Japan, you can still get one via online. For me, my source of JDM watches is www.higuchi-inc.com.

The Marinemaster uses a Seiko in-house 26 jewel calibre 8L35 self-winding movement that is the base movement for the higher end 9S55 calibre Grand Seiko. With manual wind and hacking second mechanisms, 28,800 vph, 50 hours power reserve, it is unadjusted, rhodium plated and has an accuracy rating by Seiko of +15 ~ -10 seconds per day. The 8L35 is one of Seiko's best automatic movements. Accuracy easily matches certified chronometer levels, and often exceeds them.

Seiko Marine Master Professional 1000m Automatic Diver SBDX011 - The Best Of Japan, A Review

Seiko has a number of notable offerings, Their professional watch series is one of the, if not the best, in the world. Under the Prospex sub-brand, these are purpose built tool watches.

In the last few days of 2013, I finally achieved one of my grails, the Seiko Marine Master Professional 1000m Automatic Diver SBDX011. Commonly known as the Tuna or Emperor Tuna or Darth Tuna or Hockey Puck, this is the flagship of the entire Seiko automatic divers' line.

Unfortunately, this watch is only available in Japan. But not to worry, my good supplier, Mr Katsu-san of www.higuchi-inc.com is ever ready to deliver. After just a few days, the familiar looking EMS box from Japan Post was on my desk.

Not a lot has been written about the SBDX011 even though it was released way back in April 2009. The reason is that it was destined only for the Japanese domestic market. Although Japanese horologists would provide the necessary write-up on this model, language barrier as well as the unavailability of the watch to be reviewed in depth outside Japan exacerbates the poor coverage on this model.