A32. 16x1 female spigot back
Links to photos of examples:
1982 Jawa Supreme with A31 spigot down
1979 Kynast Flying Dutchman original
1978 Puch Magnum original Karcoma
1986 Puch Cobra original
1977 Solo Odyssey with spigot left
70’s Sparta Lucky (Euro)
1970 Gemini SST 80 mini trail