Robot supply cassette
Robot suppy cassette --Robot T cassette-- consists of two pieces, a center shell and an outer shell.
All come without center spool, it is not "missing spool", it was meant to be used without spool
Just load a roll of film insdie is good enough
Only take up side needs spool
The Robot supply cassette has no rewind slot, because no need to rewind.
Read responses in photo.net