The Basics

Horological Machine N°2 is a holistically conceived and engineered three-dimensional timekeeping machine. HM2 features the first world’s mechanical movement offering: Instantaneous Jumping Hour, Concentric Retrograde Minutes, Retrograde Date, Bi-Hemisphere Moon-Phase and Automatic Winding. Horological Machine N°2 is an incredible sophisticated micro-mechanical work of art with over 450 components making up the case and movement; however its complexity has been carefully engineered for functional simplicity. The dynamic tension between apparently incongruous elements in Horological Machine N°2, such as that between cutting-edge technology and sculptural art, matte finish and mirror polish, high-tech alloys and precious metals, and between traditional watchmaking and 21st century micro-engineering, endows this impeccably finished machine with vibrant vitality. Horological Machine N°2 takes one last bow on center stage with two final limited editions of 18 pieces each, both featuring sapphire cases: HM2-Black SV and HM2-Red SV close the HM2 collection, thus ensuring its exclusivity. Dimensions (exclusive of crown and lugs): 59mm x 38mm x 13mm.

Brand: MB&F
Family: Horological Machines
Reference: 20.DSRL.B
Name: Horological Machine N°2 HM2 Sapphire & Red Gold
Produced: N/A
Limited: Yes, 18 units

Below is a detailed look at MB&F’s model 20.DSRL.B from Horological Machines watch family, including the price, case details and movement features.

MB&F Horological Machines 20.DSRL.B

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The Details

MB&F’s Horological Machine N°2 HM2 Sapphire & Red Gold (20.DSRL.B) was originally released in N/A. This watch features a automatic movement beating at a frequency of 28800 bph ( 4 Hz) to provide a 45-hour power reserve when fully wound.

The Case

The titanium, red gold, sapphire case measures 59mm in diameter and roughly 13mm thick. The round case is paired with a black color dial with proprietary-shaped hands, and a arabic numerals hour markers and minute track, covered by a sapphire glass. MB&F’s Horological Machines model 20.DSRL.B water resistance is not available. This does not mean this watch is not water resistant. A display caseback is over the back of the watch case.

Material: Titanium, Red Gold, Sapphire
Glass: Sapphire
Back: Display
Shape: Round
Diameter: 59mm
Height: 13mm
Lug Width: N/Amm
W/R: N/A

Case Diameter

Case Thickness

Lug Width

Water Resistance

The Movement

The Horological Machines 20.DSRL.B movement is a powered by caliber HM2 made by MB&F. The 44-jewel automatic movement is mm in diameter. Its balance wheel oscillates at 28,800 semi-oscillations per hour or 4 Hz. This movement offers a 45-hour power reserve.

Type: Automatic
Brand: MB&F
Caliber: HM2
Base: N/A
Display: Analog
Diameter: mm
Jewels: 44
Reserve: 45 hours
Frequency: 28800 bph
Time: Jumping Hours, Jumping Minutes

The Price

How much does the MB&F’s Horological Machines 20.DSRL.B cost? This watch was introduced in N/A and has been in MB&F’s collection for around . This watch is a limited edition with just 18 pieces released. As with most luxury watches, the price of depends on the availability and demand.

CURRENT PRICE: Not Available

For more information, visit MB&F online.


  • Brand: MB&F
  • Model: Horological Machine N°2 HM2 Sapphire & Red Gold
  • Reference Number: 20.DSRL.B
  • Limited: Yes, 18 units

Case & Dial:

  • Material: Titanium, Red Gold, Sapphire
  • Glass: Sapphire
  • Back: Display
  • Diameter: 59
  • Thickness: 13
  • Lug Width: N/A
  • Dial Color: Black
  • Indexes: Arabic Numerals and Proprietary-shaped hands
  • Water Resistance: N/A meters


  • Winding: Automatic
  • Brand: MB&F
  • Caliber: HM2
  • Display: Analog
  • Diameter: mm
  • Jewels: 44
  • Power Reserve: 45 hours
  • Frequency: 28800 bph
  • Functions: Jumping Hours, Jumping Minutes

About MB&F

MB&F logo

Maximilian Busser and Friends, normally shortened down to MB&F, is a Swiss watch brand founded by Maximilian Busser in July 2005 and based in Geneva, Switzerland.

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