I have one of my dad's old boards. It's called a sidewalk surfboard and it was basically a crudely cut piece of wood with roller skate wheels bolted on. I think this board is a bit of an exaggeration, they didn't have nails sticking out from all over the place. They were still pretty gnarly though!
my father told me about the first board him and his brother "assembled" it was a 2x4 with roller skate wheels attached to it on the first ride my uncle (my dads brother) ate shit and broke his arm my grandma threw it away and my dad never got his turn