LM Perpetual EVOReference# 07.T.GU
- Case: Titanium
- Size: 44 mm
- Movement: hand-wound caliber
- Function: Hours, minutes, day, date, month, retrograde leap year and power reserve indicators
- Power Reserve: approximately 72 hours
- Water Resistance: 80 m
- Dial: openworked with green CVD dial
- Caseback: Sapphire crystals on top and display back treated with anti-reflective coating on both faces
- Strap/Bracelet: Rubber strap with titanium folding buckle
LEGACY MACHINE PERPETUAL EVO
Although the 44mm diameter is unchanged from its 2015 iteration, the new EVO case design features a no-bezel construction, with the domed sapphire crystal fused directly to the case.
The previously circular pushers for adjusting the perpetual calendar have been enlarged into double-sprung oblong actuators, boosting the tactile comfort and ease of adjustment. For the first time in any MB&F creation, the LM Perpetual EVO is rated at 80m of water resistance, enabled by its screw-down crown. A small, but essential, detail of implementing a screw-down crown is the débrayage of the winding stem, disengaging the crown from the winding mechanism when it is pushed in and tightened, which eliminates the chance of manually over-winding the mainspring barrel.
An additional new element of the LM Perpetual EVO is the FlexRing: an annular dampener fitted between case and movement, providing shock protection along the vertical and lateral axes.
When Stephen McDonnell set out to redesign the perpetual calendar for MB&F, he proposed a system that rethought the entire mechanical basis of the complication. The LM Perpetual uses a “mechanical processor” consisting of a series of superimposed disks. This revolutionary processor takes the default number of days in the month at 28 — because, logically, all months have at least 28 days — and then adds the extra days as required by each individual month. This ensures that each month has exactly the right number of days, and removes the possibility of the date jumping incorrectly. An inbuilt safety feature disconnects the quickset pushers during the date changeover, so that even if the pushers are accidentally actuated whilst the date is changing, there is no risk of damage to the movement.
The LM Perpetual EVO is not a watch for sports. It is a watch for life.