horological machine n°1

horlogical machine n°1



Horological Machine N°1 is a highly innovative and totally original timepiece. HM1 features the world’s first movement with four barrels connected in both parallel and series, as well as the first wristwatch movement to have the energy transmitted to the regulating system from two sources simultaneously.

The three-dimensionality of the case and the sophisticated multi-strata of the dial both captivate the eye and challenge the mind. Within that structure beats a movement like no other: 376 parts, 81 functional jewels, 4 mainspring barrels, 7-day power reserve and an elevated central tourbillon.

Look deeper and you will discover that Horological Machine N°1 is more than a meticulously hand-crafted work of art, more than an intricate masterpiece of micro-engineering: it is a machine epitomizing the incredible passion and enthusiasm its collective of Friends dedicated to its creation.


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  • hm1
  • hm1 Black PVD
  • hm1 Red Gold
04 hm1 RS face
hm1 ti dial
03 hm1 RS rotor
01 hm1 RS
hm1 red gold
07 hm1 black rotor
05 hm1 black
02 hm1 RS dial
hm1 ti face
hm1 ti
close encounters


  • all
  • design
  • movement
  • case & buckle
  • dial & hands
  • communication
  • accessories
Jacques-Adrien Rochat
Isabelle Vaudaux
Régis Golay
Pierre Chillier
Dominique Mainier
Patrick Lété
Maximilian Büsser
Eric Giroud
Stewart Lesemann
François Bernhard
Philippe Loup
Estelle Tonelli
Alban Thomas
Didier Dumas
Stephen McDonnell
Denis Garcia
Maarten van der Ende
Gérald Moulière
Frédéric Legendre
Denis Parel
Laurent Besse
Serge Kriknoff
Peter Speake-Marin
Bertrand Jeunet
Isabelle Chillier
Stéphane Balet
Ian Skellern
Guillaume Schmitz
Georges Veisy




Black PVD coated 18K White Gold
Limited edition of 10 pieces


18K Red Gold
Limited edition of 10 pieces


18K White Gold, Silver/Ruthenium dial


18K Red Gold, Ruthenium/Silver dial


18K White Gold, Ruthenium/Silver dial


18K Red Gold, Silver/Ruthenium dial

specs & manual

  • view specs
  • view manual


  • Available in either 18K White Gold, 18K Red Gold, and Black PVD 18K White Gold.
  • Dimensions: length 41mm, width 64mm, height 14mm.
  • Number of parts: 48.


  • Raised central one-minute tourbillon, separate hours and minutes, 7-day power reserve.
  • Balance oscillating at 28,800 bph.
  • Automatic winding. 22K Gold Battle Axe winding rotor.
  • Four mainspring barrels in parallel.
  • Number of jewels: 81 (all functional).
  • Number of parts: 376 (including jewels).


  • Hours and minutes on separate dials, power reserve indicator, tourbillon.


  • Available in either Silver/Ruthenium (Silver) or Ruthenium/Silver (Dark Grey) or open (HM1-Black and HM1-RS).
  • Hour and Minute bridges in sapphire crystal.

Sapphire crystals

  • Dial side with anti-reflective treatment on both faces, display back with anti-reflective treatment on single face.



Horological Machine No1 is delivered with a black hand-stitched alligator strap with a 18K Gold custom designed deployment clasp.

A bespoke pin-striped flannel and leather Etro carry bag holds the Wenge timber and leather presentation case.

set the time

Your watch is equipped with an automatic movement. If it has stopped, give the winding-crown (in the push position) a few turns clockwise.

The winding-crown has 2 positions:

1 Push position = normal position for wearing the watch.

2 Pull position = position for setting the time. Pull the winding-crown all the way out and turn the hands clockwise to set the desired time.
Then, don’t forget to push back the winding-crown against the case.

change straps

1 - Remove the screw on the right-hand lug by turning anticlockwise with the supplied dynamometric screwdriver.

2 - Remove the screw on the left-hand lug by turning anticlockwise with the supplied dynamometric screwdriver.

3 - Push the central pin out from between the strap and the lugs and remove the strap. Repeat steps 1-3 on the other side of the case.

4 - Place the new strap between the lugs and slide the central pin through lugs and strap.

5 - Screw-in the left and right-hand screws into the lugs by turning the dynamometric screwdriver in a clockwise direction. Take care not to force or over-tighten screws. Repeat steps 4-5 on the other side of the case.