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Review: the Héron Mirabel GMT

I think we can all agree that watch enthusiasm is often intertwined with a bit of cosplaying. James Bond-esque fantasies of tackling adventures in go-anywhere-do-anything watches have a powerful way of convincing office-dwelling collectors such as myself that over-engineered specs are a necessity. While actual practical need for secret agent-level robustness may be minimal for most collectors (I haven’t engaged in hand to hand combat or an aquatic chase all week), the pervasiveness of often repetitive feeling GADA designs can make avoiding rugged tool watches feel like a chore. This is especially true in the microbrand arena where many brands have made the dive watch their bread and butter and seemingly the format for all other complications, including GMTs.

While I’m not here to throw shade (OK, maybe just a little) at the ubiquitous and often unimaginative tool watches that clearly reign supreme for many brands and collectors alike, I would be lying if I said the recent prevalence of dress watches in my Instagram feed hasn’t provided some much welcome variety. But even in this evolving landscape as dressier designs are having a moment, as I scroll through my curated collection of microbrand inspired hashtags, most #dresswatches from small independent brands are notably void of complications beyond a date window. Canadian microbrand Héron (known for their modern approach to neo-vintage inspired tool watches since 2021) seems to have recognized this gap between form and function, and has taken an unconventional approach to bridge it with the Mirabel, a midsize dress watch with dual time capabilities. I selected this unexpected release for the Best Watches of 2025 (so far), and when the opportunity arose to test drive one, I couldn’t turn down the opportunity to see if my selection held up in the metal.

 

$690

Review: the Héron Mirabel GMT

Case

Stainless steel

Movement

Miyota 9075

Dial

White

Lume

No

Lens

Sapphire

Strap

Leather

Water Resistance

50 meters

Dimensions

37.5 x 43.5mm

Thickness

11.8mm

Lug Width

20mm

Crown

Push/pull

Warranty

Yes

Price

$690

Héron’s site refers to the Mirabel as a “dress watch with a party trick”, with the party trick being its GMT functionality provided by a high beat “true” GMT movement. After sweating in this watch all week (its been in the 90s here in New England), I looked forward to compiling my thoughts for this review in my air conditioned office, only to quickly hit a roadblock as I wavered between starting by focusing on its overwhelmingly dressy elements or its dual time surprise. A few failed attempts at coherent communication led to the realization that the two simply can’t be separated. At its core, the Mirabel is both a dress watch and a GMT. As well executed as its enamel painted dial and cabochon crown are, these common dress watch calling cards could easily get lost in a dress watch market that is gaining momentum if it wasn’t powered by a Miyota 9075. Likewise, without these dressy elements, would I have noticed another GMT in a landscape where utilizing an NH 34 or Miyota 9075 seems to be a rite of passage for every microbrand under the sun? Probably not. But together, they certainly have my attention. 

Though the elegance and dual time functionality are equally essential to the Mirabel’s charm, we have to start somewhere, so it might as well be the first thing that caught my eye when images of this watch started surfacing this past spring: the dial. I was drawn to the white dial (the only colorway with heat blued hands, which I’m a sucker for) and brand co-founder Adam Attias was nice enough to accommodate my personal preferences with a loaner piece. Collectors with the more high stakes decision of making a preorder purchase (with shipping scheduled for October) will have a choice of four variants that provide substantial variety with four distinct but equally elegant vibes. In both the stainless steel case and the gold PVD case there is a single tone dial with high contrast details that prioritizes legibility and a slightly dressier option that pairs a dual tone tuxedo dial with accents matching the case color. Though I’m partial to the combination of piano-black indices popping against a white dial, the tuxedo variants (a blue dial with accents that match the stainless steel case and a honey-brown dial with accents that match the gold PVD case) offer even more elegance without sacrificing much legibility. 

No matter the colorway, each Mirable has a sapphire cabochon crown, an enamel painted dial, a capped second hand (my favorite minor detail and one that makes me wish more brands would cover up those unsightly center stage pinions) and a color-matched Delugs strap with signed hardware. Each colorway also features an applied inner Roman numeral 12 hour track and a non-raised 24 hour track. Separated by a railroad track and paired with hour hands exactly long enough to reach their mark, these details complete an overall package that offers a subtle amount of depth and substantially more functionality than first glances suggest. 

Distinguishing itself from literally every other GMT I’ve ever worn, the 37.5mm diameter Mirabel is notably compact thanks to the 43.5mm lug to lug of the C-shaped case. On paper, these dimensions suggest an unobtrusive and comfortable (but not all that uncommon) wearing experience. But dimensions never tell the whole story, and in the case of the Mirabel, the wearability is substantially enhanced thanks to a protruding caseback- the only surface that made continuous contact with my wrist during what just happened to be the hottest week of the summer here in New England. While other watches have lugs that tend to drape over the wrist, the stubby lugs of the Mirabel spent most of their time hovering just above my 7.25 inch wrist. Mileage will of course vary on each wearer’s experience depending on wrist size and personal preferences, but after being spoiled by the Mirabel’s summer-friendly ergonomics, I’m still adjusting to the substantially less cozy watches in my personal collection.

This comfortable yet relatively simple case seems to intentionally take a backseat to the dial and hands aesthetically, but is still full of intention upon closer inspection. A polished bezel that sits below a domed sapphire crystal leads to a lightly brushed profile that appears curved thanks to a rather dramatic bevel that bisects a lightly brushed top and high polish underside. Turning the watch over reveals a world timer caseback with a hand-painted enamel centerpiece, a fun detail rarely seen in sub $1,000 watches that highlights the brand’s strong value proposition. 

Powering the Mirabel is a Miyota 9075, which seems to be the preferred enthusiast choice over the NH 34 thanks to its true GMT functionality that allows for the local hour hand to be independently adjusted. Personally, as someone that rarely changes timezones but does update the date often when rotating through my collection, I’ve grown to prefer the quick set NH 34 over the Miyota 9075 for any GMT with a date (which seems to be most of them). Thankfully the Mirabel doesn’t have a date window (an unconventional choice that other reviews seem to have issue with, but where would it even fit without cramping a dial on the small side already loaded with detail?) making the high beat movement from Miyota the obvious choice. 

While I can’t get behind date windows breaking symmetry, I did find myself having some horological daydreams of a Mirabel with an acrylic crystal instead of the domed sapphire it uses. This watch has a number of non-forced vintage elements, and I can’t help but think of how the warm hues and nostalgic feel of acrylic would really make them shine. I understand this is a watch designed for a demographic that might prefer sapphire, but I’m going to keep the fantasy and hold out hope that future iterations might include an acrylic option. 

Final Thoughts 

A few weeks ago I set a high bar for the Mirabel by calling it one of the best watches of 2025 (so far). After an extended test drive, did it wow me enough to stay on this pedestal? The short answer is, absolutely. The longer answer is, yes, but perhaps with a bit less pizzaz than I anticipated, which I Iearned is a feature and not a bug.  As collectors we’ve been conditioned to expect maximum functionality from GMTs with extreme durability and rotating bezels capable of tracking extra time zones. Likewise, dress watches can often feel extra, leaning on textured dials, cases with seemingly endless layers of complexity, and bracelets with elevated finishing designed to catch the light from every possible angle. The Mirabel has found its lane in that mostly empty Venn diagram space between tool and dress watches- a space where 200 meters of water resistance (the Mirabel offers 50) and elegant bracelets would simply feel out of place.

Unless you’re James Bond, I’d argue most collectors would benefit from ditching the bulky and formulaic go-anywhere-do-anything standard, and instead opt for more unique designs such as the Mirabel that can go (almost) anywhere and do (almost) anything. We’ll have to workshop an acronym capable of competing with GADA, but once we come up with one, I’ll nominate this dressed-to-impress and attainably priced ($690) GMT as the leading contender. Héron

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