have a look at the main Chronograph page of OnTheDash, and see whether you can match the chronograph . . . perhaps under the Carrera or Autavia category.

If you cannot find a match there, then it would be prudent to have a look at the Gallery of Fakes and hope that the watch does not look like anything shown there.

If you still have questions, please send me some photographs or post photographs on this Discussion Forum, and we can provide further help.

good luck with it!!

Jeff