http://www.fmi.uni-passau.de/archive/doc/unix/unixhelp/Unixhelp/utilities1_sccs_compare.html (Einblicke ins Internet, 10/1995)You can compare any two versions of a file that is under the control of SCCS with the sccsdiff command:
/usr/sccs/sccsdiff -rversion -rversion s.filename
Using this command produces a line by line difference between the two versions of the file. Results are shown in the same format as that produced by the diff command.