Picked this up for $32...not the prettiest, but runs great and is cool. Case is marked Staybrite but not Rolex. I guess it is authentic...not sure why anyone would fake a stopwatch.

 

Well I cannot comment on whether it is genuine or not but if it is then it is most outstanding value for money and cool!!!!

 

Old pocket watches would get cases from all kinds of sources. My bet is this is a genuine Rolex pocket watch.
Great buy for $32!