A15. 12x1 female spigot back
Links to photos of examples:
1977 Garelli Sport original made by BAP
1977 Moto Guzzi Chiu original (lies above engine covers)
1978 Garelli Rally Sport original
1978 JC Penney Pinto original
1978 Sears Free Spirit original
1979 Batavus Starflite original
1980 AMF Roadmaster 130 original
1980 AMF Roadmaster 130
1980 Garelli VIP original
1980 Garelli Super Sport original
1983 Garelli Basic original (lies below engine cover)
1984 Garelli Basic original, needs long reserve tube due to the tank extension
1984 Garelli Monza GT original
1990’s Hero Panther, Pacer, Gizmo original