Joe-
All I can tell you is that I purchased a similar saw in 1974, and the one you have there looks a few years older than that. One thing you could try is to do a Google search for Sears Radial Arm saw manuals. There are several web sites that have extensive collections of such manuals for sale and they sometimes have pictures or photos you can match. You could also try posting in one of the big woodworkers forums, like the forum called "Knots" at finewoodworking.com

Lastly, you can post pictures here by cutting and pasting the individual HTML codes from the site where you store the photos into the body of your message, or you can post an active link to a single photo by cutting an pasting the web address for the picture in the "Optional Link URL" box below the message box when you post. I did this with one of your photos as an illustration.

Here is a link that might be useful: Radial arm saw