The Basics

A traditional wristwatch has a relatively straightforward role: to tell the time. All that is needed is a hand for the hours, another for the minutes and perhaps a power reserve indicator to keep track of running time. Horological Machine No4 Thunderbolt has a hand for the hours, another for the minutes and a power reserve indicator. HM4 Thunderbolt tells the time. HM4 Thunderbolt is not a traditional wristwatch. Dimensions: 54mm wide x 52mm long x 24mm high The aviation-inspired case and engine of the Thunderbolt are one. Neither would, nor could, exist without the other, yet each is so transcendental as to be able to stand alone as a work of art in its own right. The case of HM4 blends high-tech titanium for its lightweight and strength with a sapphire centre section offering a view into the engine. The limited editions HM4 Razzle Dazzle and Double Trouble take the aviation theme even further with real rivets in their fuselages and hand painted nose art inspired by the rebellious paintings on WWII aircraft, while HM4 RT offers an altogether more luxurious way to fly. The Thunderbolt’s engine is the culmination of three long years of development. Each of the 300-plus components – including the regulator and even the screws – was developed specifically for this anarchistic calibre. Horizontally configured dual mainspring barrels drive two vertical gear trains, transferring power to the twin pods indicating hours/minutes and power reserve. The sleek aerodynamic form of the Thunderbolt’s envelope has its roots in Maximilian Büsser’s childhood passion for assembling model plane kits, though none looked remotely as futuristic as these. The striking transparent sapphire section of the case requires over 185 hours of machining and polishing to transform an opaque solid block of crystal into a complex, exquisitely curved panel allowing the light to come in and the beauty of Thunderbolt’s engine to stand out. Every component and form has a technical purpose; nothing is superfluous and every line and curve is in poetic harmony. Articulated lugs ensure supreme comfort. Highly legible time is a fringe benefit. HM4 is available in titanium/sapphire; HM4 Razzle Dazzle and Double Trouble are limited editions of 8 pieces each in titanium/sapphire with hand painted nose art; HM4 RT is a limited edition of 18 pieces in 5N red gold, titanium and sapphire and the HM4 Final Edition closes the HM4 series in 2013 with a limited edition of 8 pieces in blackened titanium and sapphire. Dimensions: 54mm wide x 52mm long x 24mm high

Brand: MB&F
Family: Horological Machines
Reference: 40.RSL.R
Name: Horological Machine N°4 HM4 Thunderbolt Red Gold
Produced: N/A
Limited: Yes, 18 units

Below is a detailed look at MB&F’s model 40.RSL.R from Horological Machines watch family, including the price, case details and movement features.

MB&F Horological Machines 40.RSL.R

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The Details

MB&F’s Horological Machine N°4 HM4 Thunderbolt Red Gold (40.RSL.R) was originally released in N/A. This watch features a hand-wound movement beating at a frequency of 21600 bph ( 3 Hz) to provide a 72-hour power reserve when fully wound.

The Case

The titanium, red gold case measures 54mm in diameter and roughly 24mm 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 40.RSL.R 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
Glass: Sapphire
Back: Display
Shape: Round
Diameter: 54mm
Height: 24mm
Lug Width: N/Amm
W/R: N/A

Case Diameter

Case Thickness

Lug Width

Water Resistance

The Movement

The Horological Machines 40.RSL.R movement is a powered by caliber HM4 made by MB&F. The 50-jewel hand-wound movement is mm in diameter. Its balance wheel oscillates at 21,600 semi-oscillations per hour or 3 Hz. This movement offers a 72-hour power reserve.

Type: Hand-Wound
Brand: MB&F
Caliber: HM4
Base: N/A
Display: Analog
Diameter: mm
Jewels: 50
Reserve: 72 hours
Frequency: 21600 bph
Time: Hours, Minutes
Chronograph:
Additionals: Power Reserve Indicator

The Price

How much does the MB&F’s Horological Machines 40.RSL.R 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.

Specifications:

  • Brand: MB&F
  • Model: Horological Machine N°4 HM4 Thunderbolt Red Gold
  • Reference Number: 40.RSL.R
  • Limited: Yes, 18 units

Case & Dial:

  • Material: Titanium, Red Gold
  • Glass: Sapphire
  • Back: Display
  • Diameter: 54
  • Thickness: 24
  • Lug Width: N/A
  • Dial Color: Black
  • Indexes: Arabic Numerals and Proprietary-shaped hands
  • Water Resistance: N/A meters

Movement:

  • Winding: Hand-Wound
  • Brand: MB&F
  • Caliber: HM4
  • Display: Analog
  • Diameter: mm
  • Jewels: 50
  • Power Reserve: 72 hours
  • Frequency: 21600 bph
  • Functions: Hours, 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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