The 31000-3W Chronograph. The dial and hands are very. Unfortunately the back of the case suffers from someone not knowing how to open the caseback with a correct case wrench. Looking for some parts should anyone have them - case clamps and screws to secure the movement in the case, two pushers (two-part with stem and threaded pusher), and crown. Despite the missing parts, the movement is working just fine and the chronograph feature works as it should.
Case Serial No.