De Bethune is using the thin, hand wound DB2115v12 movement with their own balance wheel, which is visible at the bottom of the dial, under the arch-like structure. The XP in the name denotes that this is an extra thin (plat) watch, and indeed it stands at just 8.5mm in thickness, but this isn’t a watch about the numbers. It’s also 43mm in diameter, though a portion of that is the lug structures, which articulate from a point near the center of the case. Their movement allows the watch to sit flush against the wrist, creating one of most comfortable watches I’ve come across yet.
In addition to providing the hours and minutes, turning the watch over reveals a power reserve indication, a handy feature on a hand wound movement. Despite its svelte case, there are two mainspring barrels here, which you can see peaking through on the dial side, which provide an impressive 6 days of reserve. As you might imagine, there’s just as much thought put into the view on the other side of the case as well.