I think it was used for making spaghetti.
Pasta maker had occurred to me..................
Egg noodles?
I concur, a spaghetti roller.
A dough cutter......My grandmother could have used it.
She made homemade chicken noodle soup from scratch, even the noodles.
She would flatten the dough with a rolling pin then slice it up into pieces with a knife then add it to the soup........