Hautlence has installed its eighth manufacture caliber in a new spherical hour with retrograde minutes timepiece it calls the HL Sphere.
The independent watchmaker says it will make just 28 of the watches.
The watch is named after its blue sapphire sphere to the left of the dial that has the 12 hours engraved into it. The sphere rotates on three axes to show the hour while the minutes are displayed on a jumping retrograde dial to the right.
To the right of the dial, the minute track opens onto the movement and partly reveals the balance and gear train.
A clever piece of engineering slows down the course of the minute hand when it returns to zero so the force of the snap back does not cause as much impact on the movement and the hand.
The HTL 501-1 hand-wound movement is housed in a rounded rectangular white gold case and is worn on an alligator leather strap in the same blue shade as the hour sphere.