Omega seamaster memomatic ref 166.072
 
Dial: Omega original dial with bar lume index and 5 hands (indicates hour,minute,alarm hour,alarm minute)
Movement: Automatic Alarm (cal.Omega 980) 19 jewels
Manufacture area: 1970s
Crystal: Dom acrylic
Case metarial: Stainless Steel 
Case Diameter: 40mm (excludes crown)
Crown: push-down
Strap: Original OMEGA bracelet that fits on 18.5 - 19cm wrist