Understood to be used with Carello headlamp bowls on US spec cars, supplied without the retainer screw.
 
Part Name: Spider 101 Series Headlamp Rim, Screw Retainer Type, Without Carello Logo
Alfastop Product Code: 1LIF144
Original Alfa Romeo Part No: 101.03.65.100.00
Model: Giulietta 750 & 101
Quantity Per Car: 2