The Basics
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: | 42.BTSL.B |
| Name: | Horological Machine N°4 HM4 Final Edition |
| Produced: | 2013 – 2013 |
| Limited: | Yes, 8 units |
Below is a detailed look at MB&F’s model 42.BTSL.B from Horological Machines watch family, including the price, case details and movement features.
The Details
MB&F’s Horological Machine N°4 HM4 Final Edition (42.BTSL.B) was originally released in 2013 – 2013. 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 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 42.BTSL.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 |
| 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 42.BTSL.B 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 42.BTSL.B cost? This watch was introduced in 2013 and has been in MB&F’s collection for around . This watch is a limited edition with just 8 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 Final Edition
- Reference Number: 42.BTSL.B
- Limited: Yes, 8 units
Case & Dial:
- Material: Titanium
- 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
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.
View all MB&F watches.
MB&F Watches
View more MB&F watches.
Discover new luxury watches and watch brands for men and women from our database of over 20,000 watches across more than 100 different brands.