I'm just as useless with bikes as I am with sidecars, but I think that sidecar is called California Friendship, or to be more precise: Friendship I or Friendship II, but I can't tell the difference:
https://i.pinimg.com/originals/e9/87/b0/e987b0b5af9dbd616bc9f69c4e9f5a72.jpg
More of them can be found here:
http://floridasidecarproducts.com/viewers_sidecar_pictures