Hi, Steven:
They do look like the handles in the Redding-Saeco 1998 catalogue and the 2 cavity Lyman handles I've got here, except that the 2 cavity's jaws are shorter. I suspect the same outfit makes them for both companies. On the other hand, the handles in the RCBS 1997 catalogue are quite different, and Lyman single cavity handles were still the old style short ones, at least on a pair bought 3 years ago. My 2 cavity handles were bought 3 years ago too.
I've heard that RCBS and Saeco jaws are thinner than Lyman, and Lyman handles don't fit RCBS and Saeco moulds. My Lyman jaws are .301-305" thick around the screw holes. Would you mind measuring the thickness of your Saeco jaws and perhaps someone can mike a set of RCBS jaws too.
Bye
Jack