Alexander The Great

When Alexander The Great was waging war on the entire known world of his time, it 
chanced that he received a slight spear-wound on his left wrist. Wrapping an old cloth 
around it, he continued the battle. After victory was his, one of his aides noticed that 
the dried blood on the rag around Alexander The Great's wrist under the heat of the 
sun changed colors every hour thus providing an estimate of the correct time.
According to most historians, from that day on, Macedonaian warriors wore cloth 
treated with blood on their left forearms when going into battle, thus, providing, 
Alexander's troops with the world's first wrist watches. ... And so they called it, 
"Alexander's Rag Timeband!"