MoMA Exclusive: A design from 1981, the Riki Ring Clock features an hour hand that resembles a round eyeglass frame, its shape echoed by the ring-shaped hour indicators on the clock’s face. Riki Ring’s designer Riki Watanabe is credited with pioneering a style of personal clocks that provide an ease of viewing associated with watches. The Riki Ring Clock is made in Japan from aluminum and glass, and measures 2.4h x 9.8"diam.