With two Google-powered smartwatches currently on sale, and the circular Moto 360 already causing a stir among design geeks, wearables are one step closer to securing a place on our wrists. And while many of us arent ready to strap on a Gear Live, G Watch or Pebble just yet, that doesnt mean the smartwatch is a new concept. In fact, depending on your definition of smart, these gadgets have been fusing time-telling with extra functionality since the early 20th century.