MB&F Legacy Machines

MB&F Legacy Machines strap sizes, reference by reference.

Indicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size.

Watch line14 references
Illustration, not drawn to scale: case and lug width not on record

The story · Since 2007

The story of the MB&F Legacy Machines

Max Büsser asked what he would have built had he been born in 1867 instead of 1967. His answer, sketched with designer Eric Giroud and launched in 2011, is a round case with a 14 mm balance wheel floating above the dials.

14 mm

balance wheel floating above the dial since LM1

Read the full storyHide the story
14 mmbalance wheel floating above the dial since LM1
18,000 vphthe slow, pocket-watch beat of the LM1 balance
581components in the LM Perpetual movement
CHF 277,200price of the LM1 Longhorn prototype at Phillips in 2021

Chapters

  1. 2007 to 2011

    A round machine nobody wanted

    Büsser began the LM1 sketches in 2007, and by his account no one else in the company wanted the project. Shown to retailers at Baselworld 2011, the prototype sold four years of production before the fair ended.

  2. 2011 to 2014

    Friends build a family

    Jean-François Mojon developed the LM1 movement and Kari Voutilainen set its look and finish; the same team made the 2013 LM2 with two flying balances. The 40 mm LM101 of 2014 brought the first movement developed fully in-house.

  3. 2015 to 2019

    McDonnell rethinks the complications

    Stephen McDonnell conceived the 2015 LM Perpetual around a mechanical processor that adds days to a default 28-day month. It won a GPHG prize in 2016, and the LM FlyingT followed with another in 2019.

  4. 2017

    The LM1 bows out

    Six years after its debut the LM1 closed with a Final Edition of 18 pieces in steel. Its arched balance bridge, suspended balance and independent dual time had become the template for the whole collection.

  5. 2020 to 2022

    EVO cases and an Aiguille d'Or

    The 2020 LM Perpetual EVO introduced a bezel-free case with screw-down crown, 80 m water resistance, FlexRing shock absorber and integrated rubber strap. The LM Sequential EVO won the Aiguille d'Or in 2022.

  6. 2021 to 2025

    The Longhorn returns

    An LM1 prototype with the long lugs abandoned in 2009 to 2010 was put up for auction by Phillips in 2021, drilled with two spring bar holes. For the brand's 20th anniversary in 2025 the long horns came back on two 20-piece editions.

Moments

2021. The steel LM1 'Longhorn' prototype with black sub-dials sold for CHF 277,200 at Phillips' Geneva Watch Auction XIV in November 2021, with a large part of the proceeds pledged to Save the Rhino International.

2021. The name comes from the prototype's long lugs, and MB&F tied it to the rhinoceros, an animal hunted for its horn, when choosing the charity.

2011. Büsser showed the LM1 prototype to retailers at Baselworld 2011 and sold four years' worth of production before the fair closed, at an estimated 70 pieces a year.

Designed by

Eric Girouddesigner2011

Independent designer credited with the product design of LM1. Büsser says he makes the first sketches and Giroud turns them into 3D designs, and the two settled the LM1's shorter lugs together.

Maximilian Büsserco-designer2011

Founder of MB&F, credited with the concept of LM1. He draws the first sketches of each Machine and develops them with Eric Giroud.

Jean-François Mojonmovement designer2011

With his firm Chronode he developed the LM1 calibre from a blank sheet.

Kari Voutilainenmovement designer2011

The Finnish watchmaker defined the movement's look and finishing for LM1, and the LM101 movement aesthetics, giving the line its 19th-century style.

Stephen McDonnellmovement designer2015

Northern Irish watchmaker who designed the LM Perpetual calendar and its split escapement, then the dual-chronograph LM Sequential.

Awards

  1. 2022
    Grand Prix d'Horlogerie de Genève · Aiguille d'Or Grand PrixReference Legacy Machine Sequential Evo

    The top prize of the GPHG went to the MB&F Legacy Machine Sequential Evo.

  2. 2021
    Grand Prix d'Horlogerie de Genève · Men's Complication Watch PrizeReference LMX Titane

    The LMX took the men's complication prize.

  3. 2021
    Grand Prix d'Horlogerie de Genève · Artistic Crafts Watch PrizeReference LM SE Eddy Jaquet 'Around the World in Eighty Days'

    The LM SE Eddy Jaquet won the artistic crafts category.

  4. 2019
    Grand Prix d'Horlogerie de Genève · Ladies' Complication Watch PrizeReference Legacy Machine FlyingT

    The LM FlyingT won the ladies' complication category.

  5. 2016
    Grand Prix d'Horlogerie de Genève · Calendar Watch PrizeReference Legacy Machine Perpetual

    (2016) won Grand Prix d'Horlogerie de Geneve, Calendar Watch Prize (ref. Legacy Machine Perpetual). The LM Perpetual won its category. Winner, not a nomination.

  6. 2012
    Grand Prix d'Horlogerie de Genève · Men's Watch PrizeReference Legacy Machine N° 1

    The jury named the first Legacy Machine best men's watch a year after launch.

  7. 2012
    Grand Prix d'Horlogerie de Genève · Public PrizeReference Legacy Machine N° 1

    The same year, horology fans voted LM1 their favourite.

Generations and strap changes

  1. 2025
    LM Perpetual and LM Sequential Flyback Longhorn

    LM Perpetual and LM Sequential Flyback Longhorn: Two 20-piece steel editions for MB&F's 20th anniversary with black lacquer sub-dials and the long lugs first drawn for LM1.

    Long horns; on the 2021 LM1 Longhorn MB&F drilled two spring bar holes, one at the tip and one near the case, so the wearer chooses the fit.

  2. 2025
    LM101 EVO

    The 40 mm LM101 in an EVO case of titanium or rose gold, with 80 m water resistance and a 60-hour movement.

    Lug-width 17 mm, lug-to-lug 49 mm, integrated rubber strap.

  3. 2020
    LM Perpetual EVO

    LM Perpetual EVO: Zirconium, titanium or rose gold case with FlexRing shock protection and 80 m water resistance.

    Integrated rubber strap, not a standard lug fitting; case 44 x 17.15mm per the maker.

  4. 2015
    Legacy Machine Perpetual

    Stephen McDonnell's perpetual calendar with a mechanical processor and the balance shown on the dial, its escapement moved to the far side of the movement.

  5. 2014
    Legacy Machine 101

    The essentials only: time, power reserve and the 14 mm balance, on MB&F's first in-house movement with finishing specified by Kari Voutilainen.

    Smaller case: 40mm wide x 16mm high.

  6. 2013
    Legacy Machine N°2

    Two flying balance wheels averaged by a planetary differential; one time zone instead of LM1's two.

    Same 44 mm case family; Monochrome notes a 2017 titanium version 1 mm thinner, 19 mm instead of 20 mm.

  7. 2011
    Legacy Machine N°1

    Two fully independent time displays, a vertical power reserve shaped like a sextant and a 14 mm balance at 18,000 vph above the dials; 279 components.

    44 x 16 mm case on a hand-stitched alligator strap with gold tang buckle.

14 MB&F Legacy Machines references

MB&F Legacy Machines references in our database. Each card says where its width comes from: listed by the maker (linked to the maker's page in the details), two independent sources agree, or listed in our database and not yet verified by us.

  • 07.ZR.BL

    Legacy Machines Legacy Machine Perpetual Evo Black

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 07.ZR.BU

    Legacy Machines Legacy Machine Perpetual Evo Blue

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 07.T.GU

    Legacy Machines Legacy Machine Perpetual Evo Green

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 07.TR.BU

    Legacy Machines Legacy Machine Perpetual Evo Ice Blue

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 07.ZR.OR

    Legacy Machines Legacy Machine Perpetual Evo Orange

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 07.RR.BU

    Legacy Machines Legacy Machine Perpetual Evo Silicon Valley

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 09.ZR.BL

    Legacy Machine Sequential Evo Black

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 09.ZR.OR

    Legacy Machine Sequential Evo Orange

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 04.TR.LB

    Legacy Machine Split Escapement Evo

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 04.TR.BLB

    Legacy Machine Split Escapement Evo Beverly Hills

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 04.TR.BLG

    Legacy Machine Split Escapement Evo Taipei

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 04.TR.GSA

    Legacy Machine Split Escapement Evo UAE Golden Jubilee

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 11.TR.LG

    Legacy Machines Mb F Legacy Machines 11 Tr Lg

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified
  • 51.TR.GSA

    Legacy Machines Mb F Legacy Machines 51 Tr Gsa

    Lug width: Integrated bracelet

    Source: Database

    Attachment
    integrated
    Status
    Listed in our database, not yet verified

FAQ

Can I fit a standard strap on an LM EVO model?

Not in the usual way. MB&F fits its EVO models, such as the LM Perpetual EVO and LM Split Escapement EVO, with an integrated rubber strap shaped to the case.

What is the lug width of the LM101 EVO?

MB&F gives 17 mm between the lugs, with a 49 mm lug-to-lug length, for the 40 mm LM101 EVO; it ships on an integrated rubber strap.

How big are Legacy Machines on the wrist?

Most use a 44 mm case: LM1 is 44 x 16 mm, the Perpetual EVO 44 x 17.15 mm and the Sequential EVO 44 x 18.2 mm. The LM101 is the small one at 40 mm.

What does 'Longhorn' change for the strap?

Longhorn cases have long lugs drilled with two spring bar holes, one at the tip and one closer to the case, so the owner can choose where the strap sits for a better fit.

Help

What is lug width?

The gap between the two lugs that hold the strap, in millimetres. A new strap must match it exactly: 20 mm lugs take a 20 mm strap.

Measure it in 30 seconds

  1. Take the strap off, or look at the back of it: many straps print their width.
  2. Measure the inside gap between the lugs with a caliper or a millimetre ruler.
  3. Round to the nearest whole millimetre. Most watches use 18, 20 or 22 mm.

Strap, quick release or system?

Most watches use spring bars, so any strap of the right width fits. Many smartwatches use their own band system instead, such as Apple Watch bands or Garmin QuickFit.