Wren's Vessel turns a faceted sapphire crystal into its defining feature.

New York-based Wren introduced the Vessel, a 39 mm square, 10.6 mm-thick integrated-bracelet sports watch designed by Max Resnick. Its sapphire crystal uses matching facets on the exterior and underside to reduce the distortion that a complex curved crystal would otherwise create.

The 904L steel watch is rated to 70 meters and uses the automatic Sellita SW300-1 with a 56-hour power reserve. Wren will make 150 pieces with a steel sunray dial at $2,900 and another 150 with a meteorite dial at $3,400, before taxes.