With this new watch from Romain Gauthier, what you see is not necessarily what you get. The Logical One Secret presents some exquisite diamonds on the dial, but as you soon as you press the pusher at 4 o’clock, a new, more complex aspect of the watch is revealed. What you previously thought was the dial, is actually the cover! And by opening it, we’re presented with the Romain Gauthier’s award-winning constant force movement. What makes this mechanism different, compared to the majority of mechanical movements, is the fact that the power is kept at a constant level no matter how much the mainspring has been wound.
To achieve this, Romain Gauthier had to practically reinvent the chain-and-fusee system which supplies constant force to the movement. A traditional such system consists of a cone-shaped pulley which is wound with a cord or a chain attached to the mainspring barrel. But in Logical One Secret, the fusee is replaced with a slowly rotating snail cam, which can actually be seen on the dial, at 10 o’clock position. In this way, the supply of constant force to the movement is more effective and more reliable. Because the snail cam and mainspring barrel are on the same level, it means that only a short chain is required to connect the two components, and thus the force is always transmitted in a straight line.
All this innovative engineering is housed in the 43 mm case made of red gold. Naturally, one of the first things you’re going to notice about it is the cover, which is set with 149 baguette diamonds. These are invisibly set diamonds, appearing as if they don’t have any support at all. The cover itself actually has slight opening on its upper right section – this is done so that the two sub-dials can be shown, one for hours and minutes, as well as a smaller one for seconds. The rest of the diamonds (32) are located on the lugs. Also, one of the most interesting things about the case is the absence of a winding crown; instead, the winding is done via pusher at 9 o’clock. Finally, at 2 o’clock, we can see the crown for setting the time, featuring a sapphire cabochon.
Now, let’s get back to the dial. And there we have a lot to see, including the snail cam and mainspring barrel which are connected with a chain containing synthetic rubies. The chain links were joined using a different method: a fine sheet of paper was placed between the links and connecting plates to create fine tolerance. Another innovative thing about the movement is how the mainspring is placed in between two sapphire plates, so that the metal of the spring wouldn’t scratch the rest of the movement. The movement itself beats at 28,800 vibrations per hour and has a power reserve of about 60 hours.
Finally, this extraordinary watch is completed with a dark brown hand stitched alligator leather strap, which nicely complements the red gold case, and also the baguette diamonds. This is all finished with a pin buckle, also made of red gold.