물시계와 시간 알림장치가 자연스럽게 결합된 조선 최초의 디지털시계! 우리 손으로 완성한 최초의 시계 / [한국의 유산] 헤리티지 투모로우 - 자격루 (KBS 20170710 방송)

[UHD Korean Heritage] Heritage Tomorrow Episode 15 - Jagyeongnu (Water Clock) ■ A water clock, created in 1434, automatically tells the time by applying force to beads placed in a wooden frame. A system that organically operates a time signal doll. A modern counter with display functions. Jagyeongnu (Water Clock) is a great invention that will forever be remembered in the history of Korean engineering. #Jagyeongnu #Counter #Beads