Vintage Swatch 826 model, featuring an aluminum case and original strap.
 
Not working, possibly needs a battery? 
 
This particular model is characterized by: 
Case and Strap: A metallic, possibly aluminum, case with a matching metal link bracelet.
Dial: A blue-toned dial with a lighter blue central area and a darker blue outer ring.
Hour Markers: White hour markers, including numeric indicators at 12, 3, 6, and 9 o'clock, and dash markers for the remaining hours.
Hands: Silver-toned hour and minute hands, with a thinner silver second hand.
Bezel: A silver-toned bezel framing the dial.