Name:         SSW 6.0.5 Disk1of4.sea
Version:      6.0.5
Released:     March 1990
Description:  This version of the System Software shipped with the Macintosh

The enclosed file is a self-extracting archive of a Disk Copy 800K disk image.  To use, download, double-click the downloaded file (this decompresses it), and use Disk Copy to create a disk.
Disk Copy can be found in the Utilities folder posted here.