Mac               Processor/Speed     Rom    RAM      Disk Drives    Hard Drives

LC                68020      16MHz    1M    2M-10M     1.4M         20-500meg SCSI
LC II             68030      16MHz    1M    4M-10M     1.4M         20-500meg SCSI
LC III            68030      25MHz    4M    4M-10M     1.4M         20-500meg SCSI
LC IV             680LC40    25MHz    4M    4M-10M     1.4M         20-500meg SCSI

Useable Systems: System 6.X reqires up to 8megs; System 7.X require minimun of 4megs. 

Note:
     Mac LC & LC II can use System 6, LC III & LC 475 comes with a prepackaged System 7.1b11 
     Mac LC III came in either the LC Case or the Quatra 600 Case, LC475 came in Quatra case.
     Quatra 600 and Centris 600 is a LC III.
     Quatra 605 and Performa 475 is a LC 475.