LM Split Escapement GreenReference# 04.TL.G
- Limited Edition: 33 pieces
- Case: titanium
- Size: 44mm
- Movement: hand-wound movement developed for MB&F by Stephen McDonnell
- Function: date, power reserve, suspended balance wheel with split escapement
- Power Reserve: approximately 72 hours
- Water Resistance: 30m
- Dial: green CVD with sunray finish
- Caseback: sapphire crystal
- Hands: blued
- Strap/Bracelet: hand-stitched alligator leather
- Factory Warranty: two years
There is one technical constant that defines every single watch in the MB&F Legacy Machine collection. Functions may vary, and different complications come to the fore in each edition, but the suspended balance wheel remains literally and metaphorically above everything else. In Legacy Machine Split Escapement, this feature is not only highlighted, but raised to another level of achievement.
Just below the highest point of the domed dial crystal, the balance of LM SE beats at a sedate, traditional 2.5Hz / 18,000bph. What is rather less traditional is its construction. Unlike most of the other suspended balances in the Legacy Machine collection — indeed, unlike any other balance outside of MB&F — the balance of LM Split Escapement seems to oscillate on its own, without any visible intake of energy. The essential remaining parts of the escapement, which provide the driving impulse – anchor and escape wheel – are concealed on the opposite side of the movement, almost 12mm below; hence the name ‘Split Escapement’.
Under the balance, the triple-dial design of LM SE gives the time at 12 o’clock, the power reserve indication at 4 o’clock and the date at 8 o’clock. The date can be quickly and easily adjusted thanks to a push-button on the side of the case, next to the date dial.
Other design features are natural evolutions of those found in previous Legacy Machines, such as the organically arched balance bridge found in the LM Perpetual. The white gold launch editions of LM SE feature the micro-textured “frosted” finish that is so closely associated with antique pocket watches of the 18th and 19th century; this traditional technique was presented by MB&F for the first time in the LM 101 ‘Frost’ editions.
Antique watches featuring a frosted finish used acid baths to achieve this effect, but modern methods of replicating a frosted finish involves manually burnishing a metal surface with a wire brush. LM Split Escapement is a celebration of this technique, which is executed completely by hand for all 72 pieces of the launch editions.
The LM Split Escapement was first launched in 2017 in four white gold “frosted” editions, each limited to 18 pieces.
In 2019, MB&F introduces a new limited edition of 33 pieces in grade 5 titanium, with a spectacular green CVD-treated dial. The sunray dial finish catches the light from alternating angles, constantly changing between blue and green hues – adding a more contemporary edition to the series.