The Basics

Until recently, the world’s rarest frog was thought to be Isthmohyla rivularis, which was rediscovered in 2008 in the rainforests of Costa Rica. Now, however, that tiny tree frog’s place in the record books has been taken by a new amphibian, one with a black satin skin tough enough to take anything the jungle can dish out: MB&F’s Frog Zr, a numbered limited edition of just 18 pieces. Zr is the chemical symbol for zirconium, a transition metal resembling titanium. Titanium on steroids! To give an idea of just how tough zirconium is, the blades and vanes in modern jet engines and gas turbines can only support the incredibly high temperatures and stresses they generate thanks to a protective ceramic layer of zirconium and yttrium oxide. Ninety per cent of all zirconium produced is used in nuclear reactors, and zirconium alloys are used in space vehicles for their resistance to the extreme heat of atmospheric re-entry.

Brand: MB&F
Family: Horological Machines
Reference: 32.ZR
Name: Horological Machine N°3 HM3 Frog ZR
Produced: 2011
Limited: Yes, 18 units

Below is a detailed look at MB&F’s model 32.ZR from Horological Machines watch family, including the price, case details and movement features.

MB&F Horological Machines 32.ZR

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The Details

MB&F’s Horological Machine N°3 HM3 Frog ZR (32.ZR) was originally released in 2011. 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, zirconium case measures 47mm in diameter and roughly 18mm 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 32.ZR 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, Zirconium
Glass: Sapphire
Back: Display
Shape: Round
Diameter: 47mm
Height: 18mm
Lug Width: N/Amm
W/R: N/A

Case Diameter

Case Thickness

Lug Width

Water Resistance

The Movement

The Horological Machines 32.ZR movement is a powered by caliber HM3 made by MB&F. The 36-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: HM3
Base: N/A
Display: Analog
Diameter: mm
Jewels: 36
Reserve: 45 hours
Frequency: 28800 bph
Time: Hours, Minutes, Day / Night Indication
Additionals: Power Reserve Indicator

The Price

How much does the MB&F’s Horological Machines 32.ZR cost? This watch was introduced in 2011 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°3 HM3 Frog ZR
  • Reference Number: 32.ZR
  • Limited: Yes, 18 units

Case & Dial:

  • Material: Titanium, Zirconium
  • Glass: Sapphire
  • Back: Display
  • Diameter: 47
  • Thickness: 18
  • 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: HM3
  • Display: Analog
  • Diameter: mm
  • Jewels: 36
  • Power Reserve: 45 hours
  • Frequency: 28800 bph
  • Functions: Hours, Minutes, Day / Night Indication

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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