Robert this is pic of serial number. I purchased this Carrera from a well known and respected Heuer collector who in turn had purchased it from a watchmaker in Belgium who was a long term owner . My vendor indicated this piece at one time appeared On The Dash and received positive reviews so I never had reason to question its authenticity . It will be good to clear up these questions re 2nd execution hands and crown ? Hope we get some input from others - appreciate your help so far Robert- very kind