Breitling Datora Chronograph with navy blue surfboard subdial recently serviced and great original condition. Caseback has some opening marks from an older service.
 
Make: Breitling
Model: Datora
Reference: 2031
Year: Circa 1970's
Material: Stainless Steel
Dimensions: 39mm
Crystal: Plexi Glass
Movement: Manual 7733 
Bracelet/Strap: Leather Band
Lug Width: 20mm
Box/Papers: No