Modern Vespa : Light replacement in clamshell speedometer
Let there be light - Vespa headlights and bulbs - Vespa Magazine
Amazon.com: 6V 5W SV7 8 x 36 mm FESTOON BULB VESPA PIAGGIO CIAO CAR NUMBER PLATE LIGHT DOME INSTRUMENT PANEL LIGHT DOME LAMP INTERIOR MOTORCYCLE OLD RETRO CLASSIC AUTO MOTORBIKE : Automotive
ScooterWest.com - Complete 6V Bulb Set for Vintage Vespa