One Week With My New Longines Hydroconquest 39 Tudor Better Take Notice

Talking Watches.
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1 Video View·Apr 7, 2026
The world of dive watches is vast with the likes of Rolex Submariner, Omega Seamaster 300M, Tudor Black Bay line, and the Pelagos line. Of course, we also have the likes of Seiko and Citizen. Longines has had the Hydroconquest, a solid diver dive watch, in their line up but it was in need of an update. Longines finally gave the line a huge update in 2023 by offering the extremely popular Hydroconquest GMT. However, while 41mm is a great size, the watch community has been asking for a smaller and thinner version of the Hydroconquest.
Good people, YouTube, I'm the Watch Idiot,
and I've now owned the new 39 millimeter
Longines Hydra Conquest for a week,
and what a watch this has been.
And there's just so much to talk about.
But in short, there's just no more excuses.
There's no, it's just great for the price,
or it's great, but it's missing X, Y, or Z.
Longines pretty much wiped out every single concern.
I haven't seen this level of value in ages.
I mean, Tudor and Seiko used to be super value-driven,
but Longines has officially taken that spot.
And if the Spirit Pilot and the Hydra Conquest
are signs of what's to come, then, I mean, bring it on.
So in this video, I'm gonna get into all the details
about how this watch has been in real life
for the past week by getting into all the dimensions,
what it's like on the wrist, dial case, bezel,
bracelet, all that good stuff.
And I'll be bringing in some other watches
in for reference as well.
But there are a couple little issues that have come up
that I still can't quite tell
if it's just like a me being weird problem,
or if this is gonna be a bigger, more general issue
that other people are gonna see as well.
So yeah, I'm gonna need all of you to chime in on that.
Oh, and I forgot to mention that this thing
obviously is an absolute strap monster.
So I'm gonna be showing it on a bunch of different straps
throughout the video, so keep an eye out for that.
First up, as always, are the dimensions,
just so we know what we're dealing with here.
We've got ourselves a 40-millimeter case
with a 39.9-millimeter bezel,
a 48.2-millimeter lug-to-lug,
a thickness of 11.7 millimeters,
and a lug width of 20 millimeters.
Yes, not 19 or 21, it is 20 millimeters.
Logines, just remember that lug widths can actually be even,
which is, I'm grateful for.
And yes, I know that I said that the Hydroconcus 39
actually has a 40-millimeter case,
and that's because that's what I measured it as.
It actually makes sense because the case
is just barely asymmetrical.
The bezel overhangs on the left
and is barely inboard on the crown side,
but it's 39 millimeters effectively, I suppose.
And these dimensions on paper
line up with the real-life experience,
so no visual tricks.
And as a result, it looks perfectly sized,
and it feels thin as well.
I mean, the Hydroconcus GMT was a bit thick and chunky.
And because of these dimensions,
we've pretty much got a perfect balance
on the wrist as well,
because the entire watch now is 157 grams,
which is fairly average for a watch of this size,
which is good,
whereas the Hydroconcus GMT was 174 grams,
which is definitely on the heavier side.
And the movement is a solid one.
It's the L888.
It's got an anti-magnetic silicon hairspring
and 72 hours of power reserve,
which I will always appreciate.
But the accuracy here has been incredible.
Over the past week,
it's on average has gained less than two seconds a day.
Yeah, that's Rolex standards.
And that's one thing that I can say confidently.
The Longines watches that aren't technically cost-certified
are still regulated to be very, very accurate.
The Hydroconcus GMT that I had,
which was not cost-certified,
was also about plus a second a day,
and the same thing with the Levijan Diver that I reviewed,
and even all three of my cost-certified
Spirit Line watches that I've had
have been way more accurate than cost-certified watches.
So yeah, I'm all for it.
So then that begs the question,
are Black Bays worth,
well, now after the latest price hike of a couple days ago,
$2,650 more for the MEDOS movement and other refinements?
And then is the new Seiko HBF-001 worth it for $1,400?
$2 more for a movement that's rated
plus 10 seconds to minus five seconds a day.
I mean, yeah, I mean,
it's kind of hard to justify spending that much extra,
despite my soft spot for both of those brands.
So the awesome movement and everything else
that we've been talking about
really make this $2,200 price tag
feel like a genuinely good deal,
and that feeling doesn't really come around
very often nowadays.
The first time I saw this watch,
I had to reread all the specs
because I was going through it thinking like,
okay, this is probably gonna be priced right around $3,000,
but I just could not believe what I read,
and design-wise, it's also spot on, as we'll get into.
And now onto the dial.
It's an overall very clean look.
It's fully monochrome, so only black and white and silver,
but what got me super excited
is that it's got a polished black lacquer dial,
and I absolutely love polished black dials
because they just look pure jet black.
Matte black dials end up being kind of dark gray,
especially when it's next to a black ceramic bezel.
I mean, just look at all this contrast here,
and having a flat crystal means
that you can experience all that jet blackness
without having to constantly deal with reflections
like on my BlackBerry 54 and Speedmaster.
I was initially worried that everything would be perfect,
but then it would just have a domed crystal
since everyone is obsessed with them,
but nope, a big box checked off right here,
and on top of the fact that it's got AR coatings
on the inside and outside, which I know people don't like,
but my God, it really makes the dial pop
and the crystal disappear.
Yeah, Omega and Longines has absolutely perfected
their AR coatings, and the proportions of everything
on the dial is great.
I love the size of all the indices,
and the same thing goes for the minute track and handset.
Also, the proportions of the bezel are great too.
The numerals are just the right size,
and the overall size of the bezel
versus the dial is just perfect as well,
and I mentioned the indices,
and that is, of course, where the controversy is.
Some folks just don't like the two circles
at the six and nine, which is fair enough.
I understand why, but for me,
it's never really bothered me from my Hydra Conquest GMT days
and very much less so now, and I actually like it,
and having rectangles all around
really makes it feel much less Submariner-y,
and while we're on the dial, the lume is great,
but it's not full blue like on the Hydra Conquest GMT,
which is a bit of a shame,
but of course, not the end of the world
since it is smooth and bright,
but the lume pip and the minute hand are blue,
so that's, I guess, just to differentiate
what's needed for timing,
and I'm personally not a huge fan of brands doing this,
but again, not the end of the world.
I can't tell you just how much I've been enjoying
seeing this clean, truly monochrome design,
jet black dial, stark white indices,
same combo for the bezel, and all in the right size,
and this actually feels different within my collection,
so it's almost like a breath of fresh air,
and that's despite this being simple
and not my quote-unquote most unique design,
but in a collection where everything is different,
something that's generally kind of not different
can be unique in its own way.
Okay, so we have to talk about the bezel first
because my God, I mean, what an improvement
over the Hydra Conquest GMT.
The bezel action on that was just good.
I mean, I didn't mind it, but it could've been better,
and I actually didn't maybe particularly enjoy turning it,
so you know what?
Let's just listen to them.
First up is the Hydra Conquest GMT,
and now is the new Hydra Conquest.
Oh yeah, I'm sure you can hear the difference,
but the feeling also, just night and day.
This is just so much more refined,
and I'm really surprised that they specifically changed
and improved the bezel action on this one
because now it's genuinely one of the best
120-click bezels out there,
and there's a bit of back play
that I'm not too worried about.
If any of you own this watch in any of these versions,
let me know what your back play situation is,
and just in terms of bezel action,
I like this one much more than my Seamaster bezel action,
and it's all subjective, of course,
but this is right near the Tudor bezel action,
which is huge praise.
Tudor still is better,
but it obviously costs more than double the price,
so you get some refinement somewhere.
The bezel itself has a black ceramic insert.
It's all nice and crispy contrast,
and the bezel grip is, I guess, a chunky coin edge grip,
which works well.
I'm just glad that they didn't make the bezel design
close to the Submariner
because that just would've been a bit much.
And now onto the case.
It's fairly simple.
It's fully brushed with no contrasting bevels.
It would've been nice to see some of that here,
but no complaints,
and I've talked about Omega's and LeGene's
spicy brushed finish,
and this one is spicy, but I don't know.
It just doesn't seem quite as spicy, I guess,
but no worries, once again,
since it's well done and still very slim.
However, there are a couple of subtle things
that are not so perfect.
The first thing is that the underside
of the middle of the case, not by the lugs,
it's just a bit too sharp.
I haven't felt it on my wrist,
so it's not too much of a problem,
but it's something to note if you are sensitive to this.
And something that's been bothering me quite a bit
is that all the embossed, in-relief decoration
on the case back is just prominent enough
to feel not smooth.
It's still smoother than the edges of my Bybit 54,
but as a result, we've got ourselves another wrist shaver,
and it's surprisingly potent.
My Spirit Pilot shaved some hair off,
but not nearly as much and not nearly as quick.
Is this gonna be a problem long-term for me?
I don't know.
I guess it just depends on whether or not
this can still feel comfortable regardless of that,
but maybe I'll be able to look past the patch on my wrist
since the watch basically will always be there.
So I'll see how that goes in the long-term review.
Considering that I'm generally more sensitive
to case backs in general,
maybe things will be different for you,
but I do have a feeling that some others might notice
a random bald patch showing up on your wrist.
So yeah, if you own this watch,
let me know what your wrist hair situation is.
So now on to the awesome bracelet.
Longines can make great bracelets, for sure.
I'm so happy that it's an H-link bracelet
instead of it being just like an oyster-style bracelet
because then, of course, this watch would be
definitely much more Submariner-y.
And I also love that it's got the modern,
angular H-link design versus the more traditional
rounded design that you see on Zen watches
and other watches.
It definitely suits the modern aesthetic
of the Hydra Conquest.
And the clasp is fantastic.
It's got the on-the-fly adjustment.
The entire thing is solidly built.
There's no wiggling, and also there are no sharp edges,
which is very critical for something
that's really touching your wrist.
And a small but important detail is how the clasp closes
because sometimes there's flex or tolerances
that just aren't that great,
or it kind of just rattles a bit and just feels cheap.
But here, absolutely none of that.
This is just high quality.
Just listen to this close,
and all the buttons feel solid and smooth,
and they don't have any squeaks.
I mean, this is easily one of the best feeling clasps
that I've owned.
This is where a lot of otherwise great watches
can fall through a bit since it's a touch point,
and it'll be noticed consciously or subconsciously.
I mean, old Seiko clasps just have always suffered here,
even new ones.
And the one thing that I want to improve
and that I've said in every single video with this clasp
is that I wish that the on-the-fly adjustment
had just a little bit more range like on the T-Fit clasp,
just enough wiggle room.
Because basically, if someone has to use
about one or two spots
just for their perfect baseline adjustment,
it would be nice to have another two to three more spots
to use when your wrist expands.
Right now, I'm technically okay at one,
but it's better at two,
but I've then only got one more spot
for when my wrist expands in the summer,
and it can expand a lot.
And zooming back out to the bracelet,
it's got a four millimeter taper,
which for me is a sweet spot.
It's 16 millimeters at the clasp,
which means that we've got a 20 millimeter lug width.
I just had to do a double take and double check
that I actually read that correctly,
because I mean, Logitech just always loves
their odd 19 or 21 millimeter lug widths.
The Hydroconquest GMT and the 42 millimeter version
has 21 millimeter lugs,
which is definitely irritating,
and someone will definitely comment saying
that there's like a bunch of 21 millimeter straps,
which is true, but some,
if not most of my favorite strap options
don't have 21 millimeter options,
and I don't want to rebuy a bunch of straps
just for one watch,
and especially if it's not gonna potentially work for me,
it'll just be a waste of money.
I already have a bunch of straps
and bracelets for 20 millimeters,
so there's no risk in me just trying out
one of those straps or bracelets on this watch
just because I've already got it.
So even if I use it once, it doesn't really matter.
And another advantage of going from 21 to 20 millimeters
in the lug width is the balance of the watch
has massively improved over the Hydroconquest GMT,
which had just more metal up top.
I mean, it's bigger and thicker,
and it's got an extra millimeter bracelet throughout
all on the same 16 millimeter clasp just to even it out,
so it did feel quite top-heavy.
Here, it's just perfectly balanced.
I absolutely love it.
So there you have it.
Let me know down in the comments what you all think,
and until the next video, good day.
