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MB and F HM9 Flow in polished titanium with twin lateral pods housing balance wheels and a central planetary differential

MB&F · Horological Machine No.9 Flow

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Horological Machine No.9 Flow

Polished and satin-finished titanium

Two balance wheels, one planetary differential, and a body shape borrowed from the jet age.

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MB and F HM9 Flow in polished titanium with twin lateral pods housing balance wheels and a central planetary differential

MB&F · Studio

The Story

HM9 takes its silhouette from mid-century concept cars and early jet fuselages. The case is built from a machined titanium body with two lateral pods, each containing its own balance wheel oscillating independently.

Those two balances feed a central planetary differential, visible through the aperture in the nose, which averages their rates into a single output. The engineering rationale is real: two oscillators averaged produce a more stable rate than one.

The dial is mounted vertically at the front of the machine, which means the watch is read by turning the wrist rather than by glancing down. That is either a flaw or the point, depending on the collector.

Case construction is the hard part. The compound curves require the body to be machined from a solid billet and finished by hand, and the assembly involves dozens of gaskets to keep a case shaped like this sealed.

Thirty-three pieces per execution. Once they are placed, they are placed.

Two balance wheels, averaged by a differential, in a jet fuselage.

Specification

Case
Polished and satin-finished titanium
Dial
Vertically mounted, front-facing
Crystal
Sapphire pods and front dial glass
Movement
Manual winding, in-house three-dimensional calibre
Complications
Twin independent balance wheels with planetary differential
Bracelet / strap
Brown alligator
MB&F Horological Machine No.9 Flow, dial detail
Plate I · Dial
MB&F Horological Machine No.9 Flow, case profile
Plate II · Case and strap

AUTHENTICATED IN-HOUSE · 24-MONTH WARRANTY · INSURED WORLDWIDE SHIPPING FROM SINGAPORE

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