678.ru — a service of search, not an online store. We will find the watches at the best price, and help them buy.

X

You have chosen


Your request is under process. In a short time, as soon as the necessary information is received, one of our manager will contact you.

Thank you for choosing 678.Ru service – Your guide to the world of watches.


Fill up the form below and we will find the possible offers on the watches that interest you.


Symbols from the image incorrectly entered!


Please complete all required fields!


There were technical problems during the addition. Confirm your request soon.




 

* - Required fields

X

You want to buy a watch


Your request is under process. In a short time, as soon as the necessary information is received, one of our manager will contact you.

Thank you for choosing 678.Ru service – Your guide to the world of watches.


Fill up the form below and in a short time and our manager will tell you how and where you can purchase this model.


Symbols from the image incorrectly entered!


Please complete all required fields!


There were technical problems during the addition. Confirm your request soon.




 

* - Required fields

Search
Price from
to
Select the watches
Yachting

Ref.: V 45 SC DT YACHTING
European retail price? €8 300
Hot offer €6 000
Buy 
Hot offers
2017
Diver Chronograph

Ref.: 1503-151LE-3/93-HAMMER
European retail price? €11 500
Send request 
All new
Main>News

Perpetual Calendar from MB&F

19.11.2015

Beginning with a blank sheet of paper, MB&F and independent Irish watchmaker Stephen McDonnell have completely reinvented that most traditional of horological complications: the perpetual calendar. The result is Legacy Machine Perpetual, featuring a visually stunning in-house movement — developed from the ground up to eliminate the drawbacks of conventional perpetual calendars.

1.jpg     2.jpg

The fact that the new complication looks sensational and can be fully appreciated dial-side is just one of the many benefits offered by the new movement, controlled by a mechanical processor (patent pending).

LM Perpetual features a fully integrated 581-component calibre − no module, no base movement − with a revolutionary new system for calculating the number of days in each month. And it holistically reinterprets the aesthetics of the perpetual calendar by placing the full complication on dial-free display underneath a spectacular suspended balance.

The perpetual calendar is one of the great traditional complications, calculating the apparently random complexity of the varying numbers of days in each month − including the 29 days in February during leap years. But traditional perpetual calendars do have a few drawbacks: dates can skip; they are relatively easy to damage if adjusted while the date is changing; and the complications are usually compromises of modules powered by base movements.

3.jpg

The fully integrated, purpose-built movement of Legacy Machine Perpetual has been designed from scratch for trouble-free use: no more skipping dates or jamming gears, and the adjuster pushers automatically deactivate when the calendar changes, so no problems there either!

Traditional perpetual calendar mechanisms use a 31-day month as the default and basically «delete» superfluous dates for the months with fewer days — by fast-forwarding through the redundant dates during changeover. A traditional perpetual calendar changing from February 28 to March 1 scrolls quickly through the 29th, 30th and 31st to arrive at the 1st.

LM Perpetual turns the traditional perpetual calendar system on its head by using a «mechanical processor» instead of the conventional space-consuming grand levier (big lever) system architecture. The mechanical processor utilises a default 28-day month and adds extra days as required. This means that each month always has the exact number of days required; there is no fast-forwarding or skipping redundant days. And while the leap year can only be set on traditional perpetual calendars by scrolling through up to 47 months, LM Perpetual has a dedicated quickset pusher to adjust the year.

4.jpg

With its open dial revealing the full complication and suspended balance, it’s the harmonious mechanical beauty of LM Perpetual that really steals the show. And in an interesting technical twist, that eye-catching balance hovering on high is connected to the escapement on the back of the movement by what is likely to be the world’s longest balance staff.

Using an innovative system developed especially for Legacy Machine Perpetual, the subdials appear to «float» above the movement with no visible attachments. The skeletonised subdials rest on hidden studs, which is technically impossible with traditional perpetual calendar mechanisms because they would block the movement of the grand levier.


Taking a clockwise tour of the dial, at 12 o’clock we see the hours and minutes nestled between the elegant arches of the balance; day of the week at 3 o’clock, power reserve indicator at 4 o’clock, month at 6 o’clock, retrograde leap year indicator at 7 o’clock, and date at 9 o’clock.

LM Perpetual: complexity simplified with integrity and beauty.

Legacy Machine Perpetual launches with a limited edition of 25 pieces in 18K red gold and 25 pieces in platinum 950.


Back to the list

X
Selected watches
You can:
European retail - retail price set by the manufacturer in the European Union. Send request!