The Best Diver Money can buy? Seiko Marine Master 300 Automatic 

AGREED! These SLA versions are amazing! If I’d have known way back when, I could have saved some of my cash on other watches! I made this my daily….its just so nice!

The MM300 is arguably the best diver under 10k!

Gorgeous styling, and that movement comes as an undecorated GS movement.... to own grand Seiko at half the MSRP of most of the GS line up, not too shabby.

Beautiful watches, Marc. That finish and build quality. Simply stunning. Best regards.😆😺

That green was amazing. Keep up the good work.

Love these Seiko’s. Rugged and beautiful at the same time. Nothing else quite like them. And that lume!

Mark, thank you for this review, much appreciated. I love the green dial and the blue dial respectively. I have to add I have a watch I feel has even better Lume than this. It's called the "Islander", you might have heard of it. LOL

MM300 is my first luxury purchase. It can go Toe to Toe with the Rolex Submariners of the world. Love my SBDX017, definitely a keeper.

A classic watch ! Seiko at its best. Thanks Marc.

I scuba dive with my SKX007 all time does the job no problems. I also have a mod'd Vostok Amphibia the that I use that is incredible because the watch seals tigher with hydrostatic pressure as you go deeper.. paid 60 euros for it.. If I wanted to spend 3k+ I would just pay more and get a used GS diver. My daily watch is a Sinn 358 bought it at the factory.. just awesome watch. Thx Mark for the vids and you great customer service..

Beautiful but out of my price range. Thanks for sharing them Marc! 👍🏻👍🏻🇺🇸

Love that green one and thanks for the wrist shot. I always thought this would be too large for my 6.75 wrist but it looks like it would just fit

Seiko SLA019....... absolutely necessary to all dive watch collection,just perfect!!

i had the version before this. its gorgeous watch. but i just could not live with the thickness. made the watch top heavy. such a pity. but everytime i look at one, still awes me.

Thanks Marc.... great video & very indightful. I would love a few videos CONTRASTING the SEIKO Marine Master product range to other similar divers (pros and cons). Cheers.

Amazing watches, I have seen the green i liked it but i preferred the black for me, I have the black. Not seen the blue as yet. Just fantastic, I love mine its accurate to about plus 2-3 seconds a day untouched. Had it for about 6 months, bomb proof! But also beautiful and if anyone on fence regarding getting one dont be. Yes not cheap at all, far from it.... and yes some would say "a lot for a seiko" but you need to see and hold in hand to judge, as pics and video do not do them justice at all. I got this instead of a Tudor black bay and I looked REALLY in depth at both, you buy a watch for yourself and not for show for other people. No regrets at all.

Thanks Marc, great review. I own the Seiko Marine Master SBDX001 He-GAS diver’s 300m. I’ve had it a long time the movement is the 8L35 also but the crystal is Hardlex mineral glass. No scratches.

Really loved the black version that I had. Great watch

What a beauty that green one.

That green one!!!❤️👍

All three look very nice (and think that would improve tenfold up close and personal), that green one though!👍 Some lucky owners I reckon , so congratulations to them and if it is what you want, it’s worth the $$ (so thanks for sharing)👍🍻

Thank you Mark. This is my personal Grail watch... one day. 😄

I wish they’d kept the marinemaster on the dial instead of the prospex logo. They already have professional written on the dial....

I have the 023 from you Marc and to this day the lume kills my SD43 . Now I know why the MM gets compared to the Sub date . Best of all there is no waiting list or "Grey Prices" . This baby is a saturation diver too.

The price is high, but I really think you're paying for the quality of everything that goes into the watch. It is absolutely gorgeous, from the finishing to the dial. Really everything Marc said. And that green one 🤤

Those were amazing 😍👌😍

pea green Islander Marc! same quality for 10% of Marinemaster price. Great video.

Wow. I still regret not buying one when I saw it in Japan in 2010, and then again in 2013 when I saw one in Hong Kong. Now, prices are way out of what they used to be. Still a great watch, though.

Excellent video Mark as usual. I really need to go try one of these on I have fairly large wrist at 8 and 8th but I just like to see how it feels

Great video Mark.. Interesting on the polished hands being second to none. I have a Planet Ocean and that seems hard to beat even compared to my Rolex Sub I'd give it the edge. I'll be looking to see an MM in person now.

Love the Green (and the Blue).

Beautiful!

very beautiful. If they had something more thin....but for 300 mt WR I guess it would be a bit difficult...

I’ve serviced mine...bezel pops off super easy...crystal unscrews counter clockwise. Spot inside next to the crown to pop it out..piece of cake. I honestly kind of prefer it to traditional construction as far as servicing goes. Awesome watch, crap clasp.

Most expensive Seiko diver is a JDM SPDC 053 cost me $690 with shipping. Didn't opt for the bracelet, and not because of the money, usually change their metal anyway. Also around the time got the JDM SPDC 069 whicch I switched out to a strapcode. Came on a black silicon rubber Seiko diver strap. Fit's like a glove. Have no intention of changing it. Marc I usually buy from you but wanted JDM, next time I will call or email your office. Those watches you shown are beautiful a tad expensive, If I was to plunk that much down would opt of a Grand Seiko Snow Flake. Only have to pre owned luxury watches, an Omega 300m current mode, must have been a quick turn over because the warranty card issued by the same AD was 7 weeks old. Saved over $1000, love it. The second was a Longines Big Eye, a bit older, watch looks new with some but not a lot of use on the band. Very happy with it. Over the next year or two want to get a Speedmaster, doesn't have to be perfect but don't want vintage either. And the Grand Seiko spring drive snow flake. BTW the Grand Zeppelin LZ129 scratched my itch for a Baushaus type watch, actually looks better up front and in use then photo's Did want a Nomos and maybe someday. And the Segull 1963 flight watch. Bought a few OrentUSA Mako II's one for myself in white and a few others in black for gifts to people who have helped this past year and one for my daughter to give to her boyfriend for the Holidays. The did seem to sell out quickly, and feel comfortable knowing I got them from you and are warrantied if something goes amiss.

I had my eye, on the marinemaster along time

Very Beautiful!!!

If it’s possible could we start seeing watch reviews on a Timegrapher? I feel like mechanical watch accuracy is an elephant in the room that should be discussed more. Big fan of your videos Mark!

Good review and comparison

: ) I like the blue one best, and I have ordered one.

Even if i was a millionaire i would still feel ripped off (not because of you Mark, because of Seiko). I love Seiko but you can get a really awesome seiko diver for much much less.

just got the blue, in the honeymoon phase and its beating out my omegas, tudors, doxa, and oris. crazy good.

Just got black one SLA021 for a steal during Black Friday sale. My exit watch! My 11 other watches will be for sale soon. Haha. This watch will blow your mind, beefy but in good kind of way. Running -/+2 sec for 2 days impressive time piece

These are nice, for sure.

Really nice. Maybe one day

My grail watch, for sure.

that blue one

Wow, beautiful watch.

Just beautiful watches. Thank you for the review!

A great quality luxury diver watch. When you think about it, it’s at the low ish end of the luxury market, but It’s still way out of my budget for a diver personally. I’ve got the San Martin homage in blue for $300 which I’m very pleased with, but hey, this seiko marine master is superb quality which I’d love in my collection, but I just can’t warrant spending $3000/£2500 on a watch, no disrespect mark.

Bought a nice 200m watch from Casio...45 bucks...It is excellent. Model MDV106-1AV.

Class! Cheers.

Maybe this should be your next Islander look alike ! 👍🏻👍🏻👍🏻

These are very nice watches. I'm a fan and would love to own one. Homages exist, but I might be in line for an Islander variant....... hint hint.... ;)

These are nice watches I was gonna purchase the San Martin homage version Easier on my pocket book and based on the quality Of their 62mas homage that I have it is a deal and A good way to judge if I want to pay the big bucks For the seiko version

Very nice watch. My only gripe is the crudely finished seconds hand, which can be seen at 6:02.. At the 3k price point it would be nice if the seconds hand had the nice brushing seen on the minute and hour hands.

I own a Rolex Submariner, an Omega Seamaster, assorted other top marque... but also own the Marine Master 200 as general wear watch. I looked at one of these (the 300) in the Seiko boutique in London. OK, they are not cheap as such but re-sale value and cost aside, this watch is of absolutely superb quality. If you just don't want to, or can't kick up to the top end...but want a diver o serious quality, you could do a whole lot worse than one of these. They really are top, top notch and are, I reckon, worth every penny. Marc's good spiel aside, seeing them in two dimensions just does not do the watch justice.

How much is the non-limited edition? They look nice, but that price. Woof.

I'm still buying an Islander. :)

That's a brute! And hopefully it will be as accurate as your mention. Wouldn't want to try to regulate it!

Interesting that the polishing at the side flank make the watch looks smaller.

Awesome pieces. Too bad I've got too many divers already 😔

Hi I’m really enjoying your videos can I ask a quick question is there any difference between the SBDX025 and the SLA version? For example are they both made in Japan and have the Japan made Logo on the bottom?

I have the new SLA047 version with black ceramic bezel and green dial. Absolutely stunning watch, though I am disappointed in the accuracy as mine gets right at the outer limit of specs at +15 seconds per day after two weeks of wear. Hopefully it settles more (was originally +23 seconds), as Seiko won’t warranty it if within listed specs. Oh well, might have to send for regulation, though definitely worth doing as this watch is finished at a level equal or perhaps even nicer than my Rolex Milgauss.

The SBDC watches appear a little more refined (not as bulky) and they are a third of the price.

I got an ad of this watch right before the video 😂

Marks hows the bezel action on these ? It’s one of my pet peeves especially in this price range ... this watch is growing on me . Actually think I prefer it over the grand seiko diver

Dear Mark, Many Thanks for your comparison of the top professional dive watches from Seiko. Appreciate if you could do the same comparison and details for the three versions blue, green and black dials for the Baby Marine Master having 200 Meters water resistant, including the special and limited editions.

YES.

Amazing, I wonder how many of the people out there that are judging the cost of these watches have actually seen and handled one?

Mark would the Sarx033 bracelet fit the 300mm? If so that would be a fabulous look!

I think I found my next watch!

Proxima mm300 👌🏻

Hi, is there an updated 300 with lume at the 3 position? If so are there any other differences? Thanks and great comparison.

Do they still use the pin/bushing deal for resizing the strap? I have seen that system on Seiko and can't for the life of me figure why they use that over a normal friction pin or screws.

Very Kool

They look so beefy!

Wondering if you have received in stock any of the Prospex LX line yet?

The MM300 vs the Breitling SUPEROCEAN II 44 ? wich one to choose :) ?

Lovely, but do they have to be quite so thick? Something I’ve noticed about seiko & grand seiko: even the beautiful GS dress watches are a bit on the thick side ☹️

How does this compare to the GS equivalent? Does giving regular Seiko the GS movements cheapen GS or does it elevate seiko?

For $3K, screwed links should be expected.

Hello. Have you tested the power reserve of the MM300? I know that the latest mm300 got approx 50 hours power reserve. But mine got 56 hours. Is this normal? I tested it twice already just to check the power reserve

Beautiful watch. A little too thick in my opinion and liking. I think the end of the "chunky" watch craze days are within sight. I for one am not disappointed in that probability. That dial is almost too busy. Less is more......… Just my $.02

Nice but would go for Tudor Pelagos instead

At the start of the video I was wondering, "Why haven't these beauties been on my radar?". Then you mentioned the price, oh that's why.

I can't drop the asking prices Seiko wants so I bought the closest thing to the Green MM 300m a San Martin Hommage and I must say for under $400 it is well made has a sapphire crystal, ceramic bezel, 300m water resistance, and a monobloc case also came with a free nato.

Hi Mark, I am currently looking for the LE edition (Green Dial) 140th Anniversary. My question is, .. I thought it had “Marine Master 300M” on the dial? And not “Automatic Professional “? Anyway do you still have one I can purchase?

I want the green so bad..

Doxa Sub. That or a Pagani Design PD-1639. Sapphire crystal, NH35A, milled clasp, ceramic bezel, screw links, crappy lume, 100 m WR, solid end links... $60.00!!!

Not as elegant as a Sub, but it’s a watch Geek’s wrist candy.

Love the Seiko but honestly, I'd save my money and buy an Islander watch that looks just as good. I was about to pull the trigger on one of your black skx013 alternatives for my smaller wrist (beautiful watch) and the same week I was layed off by my job in the UK during the pandemic 🤬 Don't worry though buddy, your watch will be the first money I spend for non-essentials when this is over. I hope that your business is not affected too badly due to mostly being online sales. Hold on and see you all on the other side! 😁

Damn those are beautiful.

i like everything but the bracelet

The new 300 meter is no longer a marine master but a "Professional Diver's prospex series, Seiko kill their own "MM" DNA by removing the 'Marine Master" from dail. Can you imagine Rolex remove "Submariner" text from it dail and replace with "X"?

Blue or black Marine Master ? Which is more beatiful ?

Just curious: what do you make of the Archimede

Do a video on SLA 045

This one or the new LX despite the price difference?

SBBN033 FTW