Seagull Okeanos 70th Anniversary Professional Ultra Diving 1000M Auto-Mechanical Watch Reference 816.37.1217 (similar to 816.37.1217H) - A Bold Statement of Engineering and Value, A Review (plus Video)

  My trip to China's mainland in May 2025 was a revelation, whirlwind of futuristic cities, bustling markets and homegrown innovation. Amidst modern streets of Shenzhen, I sought a tangible keepsake to commemorate the journey. 

 

While souvenir shops peddled trinkets, I gravitated toward something deeper: a mechanical watch from a Chinese brand, a symbol of the nation’s growing engineering prowess. After some time of doing research, I found the only boutique by Seagull in Shenzhen. By just using public transportation (the metro), getting to that shop from I was staying was easy and very relaxing. As it is the starting of summer, the air-conditioning was a godsend! It is also makes it sweeter when the cost of public transportation in China is really dirt cheap with extensive coverage.

 

At the boutique, I was surprised the number of models available. There was a large number of watches with tourbillon movements which I have not seen before. While looking at the watches on display, I came across a new series of dive watches called Okeanos. This series is a blend of mythic storytelling, technical ambition, affordability and coupled with Seagull’s 70-year legacy as China’s oldest watchmaker. As the first under the Okeanos series and the first having the 1000-meter water rating for the brand, I settled on the Seagull Okeanos 70th Anniversary Professional Ultra Diving Watch. It made it the perfect memento for my first trip to mainland China. 

Seiko Gundam 40th Anniversary Limited Editions Prospex 1000m Marinemaster Professional Zaku II SLA029J1/SBDX027 (similar to SLA031J1/SBDX029) - Gundam Tuna, A Review (plus Video)

I have to be honest, I am not an anime fan. Although The Mobile Suit Gundam television series was launched when I was a kid (I was a nine year old then), it wasn't a series that local television companies in Malaysia (RTM and TV3) broadcast. As such, it was more than a decade later that the series was broadcasted in Malaysia hence the fan base is more junior in age compared to me. When it was announced that Seiko will be doing a collaboration with Gundam for its 40th Anniversary celebration, I wasn't that impressed.

As you know, I do have the SBDX011. When I compared the original Emperor Tuna against the collaborative Gundam Tuna, I started to get interested. There are a number of tweaks in the new Gundam Tuna that I recommended Seiko to consider changing when I first reviewed the SBDX011 years ago. Anyway, I am a sucker for unique stuff from Seiko and after considering the merit of getting it for the collection, I pulled the trigger.

Head-To-Head: Citizen Promaster Eco-Drive Professional Diver 1000M Titanium BN7020-09E Solarzilla versus Citizen Promaster Autozilla 1000m Titanium Divers Watch NH6930-09F (NH6931-06E)

Citizen Watch Company, under the Promaster line has come out with some heavyweights in dive watches in the last few years. The brand's extreme dive watches, capable of withstanding 1,000 meters of water pressure under the Godzilla series have become iconic with collectors. The two famous models, the Citizen Promaster Eco-Drive Professional Diver 1000M Titanium BN7020-09E Solarzilla (left of the photo below) and the Citizen Promaster Autozilla 1000m Titanium Divers Watch NH6930-09F (NH6931-06E) (right of the photo below) are Kings of the Hill for Citizen.

Deep Divers in the Collection (1000 Meters of Water Rating or More)

I love heavy duty divers and I have collected some of the deepest diving examples. This review will highlight my watches with 1,000 meters of water rating and do some form of comparison between them. As at the date of this posting, I have 14 watches with water rating of 1,000 meters or more.

	Number	Movement	Material
Citizen	2	Automatic, Solar	Titanium
Seiko	2	Automatic	Titanium
Rolex	1	Automatic	Stainless Steel
Omega	1	Automatic	Stainless Steel
Deep Blue	2	Automatic	Stainless Steel
Ocean7	2	Automatic	Stainless Steel
Steinhart	1	Automatic	Titanium
Hamilton	1	Automatic	Stainless Steel
Bell & Ross	1	Automatic	Stainless Steel
BALL	1	Automatic	Titanium

The links to the reviews on these watches are as follows in no order of preference:

1. Citizen Promaster Solarzilla 1000M BN7020-09E
2. Citizen Promaster Autozilla 1000m NH6930-09F
3. Seiko Marinemaster 1000m SBDX011 
4. Seiko Perspex Marinemaster SBEX001G 
5. Rolex Oyster Perpetual Deepsea M116660-0001 
6. Omega Seamaster PloProf 1200 M Co-Axial
7. Deep Blue Pro Seadiver 1k Blue Dial
8. Deep Blue Depthmaster 3000m Green
9. Ocean7 LM-8 Professional Deep Diver
10. Ocean7 LM3 V2 1250m Dive Watch
11. Steinhart TRITON 1000 Titanium Titan
12. Hamilton Khaki Navy BeLOWZERO 
13. Bell & Ross BR02-92 Pro Dial Diver Watch
14. BALL Engineer Hydrocarbon DeepQUEST
     

Citizen Promaster Eco-Drive Professional Diver 1000M Titanium BN7020-09E Solarzilla - The Ultimate Tool Watch, A Review (plus Video)

In my collection I have the 2002-introduced Promaster 1000m (Reference NH6931/NH6930) nicknamed the “Autozilla”. In 2017, when I heard that Citizen was pulling all the stops to come out with something spectacular for Baselworld 2107, I was curious to see the great reveal.

Citizen did not disappoint. The Citizen Promaster Eco-Drive Professional Diver 1000m (Reference BN7020-09E) is the world’s first solar-powered saturation capable diving watch. It is also Citizen’s second 1,000 meter diver. This watch is one of the few watches that can be define as an extreme dive watch. It is capable of exceptional depth and not suited for formal wear. It has been given the nickname “Solarzilla”.

The Solarzilla follows the design philosophy of its predecessor, the Autozilla. Slightly larger than the Autozilla, the Solarzilla is different in a few aspects. First, it is an Eco-Drive instead of automatic. Second, the new diver comes with an additional locking system that has a visual indication to show when the timing bezel is unlocked. Third, the addition of a power reserve reserve indicator.

Hamilton Khaki Navy BeLOWZERO 1000m Automatic H78585333 - One of the Most Comfortable Deep Divers Around, A Review (plus Video)

In 2015, Hamilton launched the Khaki Navy BeLOWZERO 1000m Automatic H78585333 to be featured in the Hollywood blockbuster movie The Martian on the wrist of the hero, Mark Watney played by Matt Damon. The BeLOWZERO has a futuristic feel to the design which fits in nicely with the movie tie-in. It has the typical black-out military styling with the casing, dial, Arabic numerals, hands, bezel and everything else except the numerals on the date wheel either in black or in various shades of grey. Although paired with a rubber strap straight from the box, the watch does come with a stainless steel bracelet that you can replace by using a strap replacement tool provided as well.

Although I took note of its existence, I did not put in on my priority list then. However, much later I started to see that the specifications of the watch does not correspond to the price demanded. In fact, the watch was underpriced in my opinion. Think about it: dive watch with 1,000 meter water rating; automatic HEV system; sapphire crystal; PVD case surface; a strap and a bracelets as options; Swiss made; ETA 2826 Caliber; and a strap replacement tool - all for just RM6,080.00 MSRP in Malaysia.

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 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.

Citizen Promaster Autozilla 1000m Titanium Divers Watch NH6930-09F (NH6931-06E) - Pure, Unadulterated Dive Watch, A Review

A grail watch in my view, the Citizen Promaster Autozilla 1000m Titanium Divers Watch NH6930-09F (NH6931-06E) is the epitome of design and manufacturing prowess of Citizen. The ability to design a watch that can take on an extreme environment, in this case, water pressure of 1,000 meters using titanium should be acknowledge. In this case, Citizen uses a proprietary alloy of titanium that has gone through a process called "Duratec".

There are two reference for this watch. One for Asia and the other is for North America and Europe. The NH6930 is an Asian market designation and the model with this designation has English and Japanese for the day wheel. Meanwhile, the NH6931 designation has English and Spanish for the day wheel.