The original iSight Camera from Apple was an external cylindrical camera with a FireWire connection that shipped with a variety of mounts for use on different Mac computers of the time.
The iSight Carrying Case is referenced in the Setting Up iSight section of the iSight User’s Guide with a diagram, “iSight includes the following components.”
iSight carrying case
Flat-panel display and flat-panel iMac mount
eMac and desktop mount
Magnetic display mount
PowerBook and iBook mount