Swatch Sistem51 Watch
Leave it to a company known for its simple, plastic, infinitely collectible watches to crank out the world's least complex automatic timepiece. The Swatch Sistem51 Watch is the Swiss company's very first automatic watch, boasting an innovative self-winding movement that uses only 51 parts spread across five separate modules and features an impressive 90 hour power reserve. You can see the movement through the back of the hermetically sealed plastic case, which comes in blue, red, white, and black colorways.