Timekeepers Club / November 8, 2022

Montres KF EI8HT KF 09-08

The distinctively shaped octagonal case housing this major horological complication determined the name of the KF model: EI8HT. This 42 mm-diameter faceted pink gold case is set with diamonds on the bezel and lugs. Echoing this design, the likewise gemset rose gold hands and inner bezel ring enabling time readings appear on a diamond dial. This tender and sparkling model with its nude satin strap features a tourbillon that stands out in terms of both its size and the transparency of its mechanism.

The movement can be seen through the transparent sapphire crystal caseback revealing the mainplate studded with stars and diamonds. The mechanism is all the more visible in that it is built on pillars enabling it to fit even more closely to the glass on the back of the watch. True to its precision timekeeping aspirations, the Novamag ® 02 calibre gives pride of place to the tourbillon function. Visible through a large opening at 6 o’clock, this one-minute tourbillon is equipped with an escapement 100% designed and developed by KF, as is the rest of the movement powering it.

The result of this approach is a watch meeting the criteria of reinforced anti-magnetism and entirely made in La Chaux-de-Fonds. The tourbillon and balance-stop functions are naturally accompanied by the indication of the hours and minutes displayed on the dial.

The caliber

This calibre has been designed and built around its balance to meet the standards of pure chronometric performance: an extremely rare event in the industry. To achieve this, Karsten Frässdorf, inventor of the Spirograph® balance, has registered no less than five patents. This distinctive balance enabling adjustment by inertia and thermo-compensation is accompanied by a balance-spring fitted with a Grossmann inner curve and a Phillips outer curve.

This tourbillon mechanism, which is intended to be an everyday instrument, is water-resistant to 50 metres. It beats at the rate of 18,000 vibrations per hour, thereby guaranteeing optimal chronometric precision.

This durable movement boasts a 72-hour power reserve theoretically enabling the watch to run for this period of time without needing to be manually wound via the crown. However, to improve chronometric precision, this autonomy is deliberately reduced to 45 hours by means of a “Maltese cross” stopwork mechanism ensuring a more stable driving force.

In response to technological developments, this new movement is setting new standards in terms of resistance to magnetic fields – an important criterion when choosing a tourbillon.

The Novamag ® 02 calibre thus maintains its accuracy regardless of its environment. The reinforced anti-magnetism characteristic of KF complies with the ISO 764-2020 established in 2020, as implied by its code-name. This means that not only the escapement, but the entire movement – and more generally the watch as a whole – are endowed with enhanced anti-magnetic properties.

Technical specifications

Montres KF EI8HT

Reference: KF 09-08


  • Material: 18k pink gold set with diamonds on the bezel and lugs
  • Diameter: 42mm
  • Thickness: 11mm
  • Glass: Sapphire crystals front and caseback
  • Water-resistant to 50 meters

Dial and hands

  • Diamond set dial 
  • Applied hour markers and hands matching the case material and filled with luminous material


  • Novamag ® 02 calibre
  • In-house - hand-wound movement
  • Frequency: 18'000 vph (2.5 Hz)
  • 72-hour power reserve on two barrels, limited by a Maltese cross (45 hours)


  • Hours, minutes, seconds on the one-minute tourbillon

Strap and buckle

  • Leather strap with a folding clasp

MSRP: Price on request

For more information, please visit Montres KF website.


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