This is a hard disk drive with integrated circuit boards. The lower circuit board is marked "CRICKET ANALOG-2." Other numbers are listed as a means of identification.
Identifying Numbers
Other number
CR7D
Hand-written sticker located on IC
Other number
MI 5-83
Hand-written sticker located near rainbow-colored wire on side of drive
Serial number
X1 CI-4
Hand-written sticker located near rainbow-colored wire on side of drive