Oh, it has both a spider and a basket! In fact, the spider (a variant of the same approach as used on our Parthenon driver) is what allows it to really work properly. The basket is the tube; a mounting flange is on the top of the tube for mounting into a cabinet.
And I have to say that the Spider/Surround on this new motor
is just plain F-U-N-K-Y! It's so odd watching it work when
you are used to the typical pleated spiders