The world is growing together, but one border still remains: time. With the Duo 24 wristwatch, this boundary can be overcome. It is one of the first dual-time-zone watches based on the one-hand principle. The outlying main display shows the local time, while the secondary display, positioned at a lower level in the dial, can present the time of any other time zone chosen by the wearer. Furthermore, an artificial horizon structures the inner area into halves, for day and night respectively, thus allowing the day half of the second time zone to be identified at a glance.