Tenkei Kobo is renowned for their molding technology, and CS15 is a masterclass. The bark is not merely a flat surface with grooves; it is a landscape of ridges, valleys, and peeling layers. The resin casting captures the rough, coarse nature of aged wood. Looking closely, one can almost feel the splinters. The texture varies from the root flare—where the wood transitions into the soil—to the smoother, yet still weathered, mid-trunk.

: The full CS15 set typically includes various tree species, with being a specific botanical model within that library.

What does "Tree" mean in a metal watch context? Unlike standard production runs where every dial looks identical, the grading system refers to the organic growth patterns left by the cutting bit.