It is virtually impossible to tell if this is the original Carello item or not. Just look at the photos. This item comprises the lamp, lamp seating rubber and the cable entry sealing rubber boot.
 
Part Name:  Spider Carello Front Turn Repeater Lamp, Seating Rubber & Cable Entry Sealing
AlfaStop Product Code: 1LIF172
Original Alfa Romeo Part No: 1413.80.725 & 1483.90.212
Model: Guilia 101 Series, Giulietta 750 & 101
Quantity Per Car: 2