Vireo means powerful and fresh. The otherwise seemingly unassuming sparrow species of the same name is remarkable for its unmistakable and indefatigable song. Of course neither the Vireo Chronograph nor the Vireo Dual Time can sing or fly. But powerfulness, freshness and a pleasantly reserved appearance are definitely attributes that might apply to both.   The most notable feature of the Vireo series is its inner dial ring. In the Vireo Chronograph it carries the chronograph display. In the Dual Time it carries the names of cities in different time zones around the world. With the Vireo Chronograph, a businessman will always find himself in the very best of company: The Chronograph tells the time in an elegant, sporty, reliable and exact way.