Tray loading CD Drive
AppleCD 300 Plus. This is an internal SCSI tray load 2X CD-ROM drive.
It can also be installed in an external SCSI case for use with any Macintosh from the Plus to Beige G3 and Apple IIGS. This drive replaced the AppleCD 300 drive which uses a CD caddy.
While it can be used with any Macintosh with internal SCSI and a drive bay, it came as either standard or optional in the Power Mac 8100, 8150 and Performa 6100 series. Manufactured by Matsushita, CR-503-C.