While I was in school in Italy the school brought us to the last factory. For me thats like a kid getting the golden ticket to Willy Wonka's chocolate factory. They had a library of lasts. It was filled with the wooden prototypes they've made over the years many still with the companies and designers names on them. We could order any we wanted and they would make the resin types you see pictured above.
The lasts you see above are used to make ballet shoes for dancers. They are so well designed they stand en pointe on their own. They are heavy so the fact that they balance shows what an art it is to make lasts.