The Seiko SUP451 is a ladies solar-powered watch from the Crystals collection, featuring a striking blue mother-of-pearl rectangular dial with grey hands and pyramid hour markers. The stainless steel case measures 25 mm in diameter and 6.34 mm thick, with a fixed bezel adorned with crystal accents. A 12 mm stainless steel bracelet with a push button deployant clasp completes the design.

Powered by Seiko's V115 solar caliber movement, the watch converts light energy into power with a 12-month power reserve, eliminating the need for battery replacements. The Hardlex crystal provides scratch resistance, and the watch is water resistant to 30 meters (100 feet). Functions include hour and minute display. Also available in a two-tone gold-tone and stainless steel version (SUP452).