This is a very collectable and highly sought-after 1960s vintage Wittnauer (by Longines) Professional chronograph housed in a 35mm stainless steel case with screw back. The original red, black, and white-accented dial looks amazing with its original pencil-style hands. Notice the silver tracking on the outside of the chronograph registers. A Wittnauer winding crown is installed. The famous and fine Valjoux 72 chronograph movement was just cleaned and is accurately keeping time.