Hi Jeff - great addition to your collection. I can see the attraction of the early movement and caseback especially when the dial is in such pristine condition. I assume the decimal scale is blue and not purple as it appears in the picture. Also interesting is the lume dots on the hour markers appear on the outer ring and not peeping out from the marker which may be more common on later Carrera dials. Mine is the same.
regards
Paul
www.heuerworld.com