Original Perpetual Calendar and The Naked Watchmaker Collaboration edition.
Introduction
This page retains the material used to explain and catalogue the original Frederique Constant perpetual calendar in addition to the new limited edition developed by The Naked Watchmaker.
The original Reason for deconstructing this watch
A simplified perpetual calendar retaining classical elements made in an industrial execution, whilst assuring a solid construction built for longevity.
Introduction/functions
The FC-775 calibre was developed by Manuel Da Silva Matos, R&D director, and Pim Koeslag, ex-technical director of Frederique Constant, over a three year period and was launched in 2016.
It displays hours, minutes, moon-phases, date, day, month and leap year. Once programmed the mechanism will take into account the months with 30 and 31 days, the 28 days of February and also the leap year cycle with the return of 29 February every four years.
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Frederique Constant/The Naked Watchmaker collaboration
The design concept was to open the dial in order to view the technical aspects of the perpetual calendar following the deconstruction that had been originally executed, and is shown below. In addition, improving the overall readability of the different indications of the calendar, and altering the leap year indication into a more contemporary system.
The cutouts in the dial allow for the components and decoration to be viewed and accentuate the three-dimensional mechanics of the mechanism.
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Technical Specifications
Frederique Constant own QP manufactured FC-775 calibre. Frequency of 4 HZ (28’8000 vibrations per hour), 26 jewels, 38-hour power reserve. The diameter of the movement is 30 mm and 6.7 mm thick. The movement is made of 191 parts.
Polished stainless steel 3-parts case, diameter of 42 mm, 10.2mm total thickness. Convex sapphire crystal, See through sapphire back. Water-resistant to 3 ATM.
The leap year indication (below) was designed to avoid the months indication being obstructed in any way by an additional hand, the years are shown through an opening at February, each year is a different colour and the leap year is red. Year 1 : white, year 2 : yellow, year 3 : black, year 4 : red.
The Day and Date subsidiary-dials and hands are larger than the original Frédérique Constant dials, providing greater visual visibility.
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The use of SLN links to vintage watches as well as providing visibility at night.
The blue bridge colour is for contrast with the steel and gold coloured components to emphasise the mechanics. Blue also traditionally holds a special place in the world of horology linking with blued steel hands and screws.
The brown of the dial was used to generate a vintage feel for a classical watch. It also allows the indications in white to be strongly contrasted along with the hands- It is also congruent with the choice of strap.
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