School By Polly213 Period: 5500 BCE to 5500 BCE first o'clock Egypt Period: 4000 BCE to 4000 BCE sundial Egypt Period: 3500 BCE to 3500 BCE The most famous obelisk Egypt Period: 325 BCE to 325 BCE Water clock (alarm clock) Greece Period: 30 BCE to 30 BCE 30 meter sundial Rome Period: 600 to 600 clocks like candles with incense China Period: 1206 to 1207 Water driven astronomical clock Persia Period: 1500 to 1600 Sundial Europe Period: 1700 to 1800 Mechanical watches All world Period: 1900 to 2000 Pocket watch All world