The Seiko SNQ121 is a men's analog dress watch featuring a black ion-plated stainless steel case paired with a two-tone stainless steel bracelet. The fixed black ion-plated bezel frames a sleek black dial with silver-tone hands, index hour markers, and minute markers around the outer rim. A date display is positioned at the 6 o'clock position, and the watch is powered by a Japanese quartz movement.

The 40mm round case measures 8–10mm thick and is fitted with Seiko's scratch-resistant Hardlex crystal. The 19mm-wide bracelet secures with a fold-over clasp with double push-button safety release. The watch features an analog display with functions for date, hour, minute, and second. Bezel includes a 24-hour time display ring. Sport watch style with Japan movement label.