The timepiece is inspired by the 12th of the 72 poetic microseasons in Japan that is called kaminari sunawachi koe o hassu (雷乃発声), or the rumbling of the distant thunder, which falls at the end of the Spring Equinox in Japan. Drawing from this inspiration, the design shows a visual interpretation of the kaminari (雷) through the meticulously hand-finished graining on the brass dial base, radiating a frosted yellow gold hue. Beneath the surface lies a hand-finished manually wound movement adorned by artisanal techniques that includes anglage, perlage, and frosting.