MB&F HM10 Bulldog — the dog, on the wrist

MB&F HM10 Bulldog Ti on the wrist — photo: Uncommon Artifact

Photo: Uncommon Artifact

Grade 5 titanium body, blue aluminium eyes for the time, and jaws that close as the power runs down: the HM10 Bulldog, photographed on its launch-spec blue strap.

Verdict

What it is MB&F Horological Machine N°10 "Bulldog" Ti (ref. 100.TL.BL) — grade 5 titanium case, blue hour and minute domes
Price US$105,000 — MB&F launch price for the Ti version (2020, before taxes)
Availability Launch edition, 2020; through MB&F retailers and the M.A.D. Gallery
The angle The power reserve is the dog's jaws: teeth showing when fully wound, shut when the Bulldog is spent.
Verdict Fifty-four millimetres of mechanism worn like a pet. It should not work as a watch. It does.

The story

The Bulldog, launched in 2020 as Horological Machine N°10, is built as an anatomy lesson. The rounded titanium body carries two "eyes" — paper-thin aluminium domes, half a gram each, rotating under the sapphire to read hours on the left and minutes on the right against fixed triangular markers. Above them floats the brain: a bespoke 14mm flying balance wheel, suspended under the crystal dome. The lugs are articulated "legs" that flex to wrap the wrist, and there are two crowns at the rear of the body — the left, at 11 o'clock, winds the watch; the right, at 1 o'clock, sets it. Engraved on the body is the instruction that comes with the animal: "Forget the dog, beware of the owner."

Photographed on the wrist in the Ti version's launch configuration — blue domes, blue hand-stitched calf strap on the Velcro system. Two observations from the wrist. First, the size lies: 54 by 45 by 24 millimetres sounds unwearable, but the articulated legs and the strap pull the body down and it sits like a much smaller watch. Second, the time genuinely reads at a glance, because the markers stay still and the numbers come to them. The judgement: the HM line's humour is always engineering-serious underneath — 301 components and 34 jewels, assembled to make a dog tell the time and bare its teeth when it is hungry.

Specs

Reference 100.TL.BL
Movement Manual-winding, designed and developed in-house by MB&F — 301 components, 34 jewels, 2.5Hz (18,000 vph), single barrel, flying 14mm balance wheel
Power reserve 45 hours, indicated in 3D by the opening and closing of the jaws
Indications Hours and minutes on rotating aluminium domes, Super-LumiNova numerals and markers
Case Grade 5 titanium, 54 × 45 × 24mm, articulated lugs
Crystal Sapphire (two crystals), anti-reflective coating on both sides
Water resistance 5 ATM / 50 metres
Strap Blue hand-stitched embossed calf leather, Velcro system, grade 5 titanium buckle

What to check before buying

  • The jaw mechanism. Wind the watch fully and confirm the jaws open smoothly and the teeth show evenly. The power reserve is a mechanical linkage, not a dial — any stiffness is a service conversation.
  • Dome alignment. The hour and minute numerals should register cleanly against their fixed triangular markers. Misalignment points to movement work.
  • Service history. The flying balance sits exposed under the dome and the engine is MB&F's own. Ask for factory service records; this is not a watch for a generalist bench.
  • The Velcro strap system. Fit on the Ti version depends on the strap's hook-and-loop closure. Check it still grips — a tired strap changes how the whole body sits.

Price record

HM10 Bulldog Ti US$105,000 — MB&F launch price (2020), before taxes; the red gold and titanium version launched at US$120,000

Want one?

  1. In the shop: browse current stock — one-off pieces, and they turn over fast.
  2. Hunting one? Join the Want List — tell us the maker and the budget; pieces like this surface in our trawl most weeks.
  3. This one: the model and factory specifications are at See it at MB&F — mbandf.com. Not our listing. See Disclosure.

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Photographed for the daily wrist-shot story series — not our stock, and not a sales listing. Disclosure

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