Byrdnyrd,
I appreciate the feedback. Unfortunately, using this site as a learning tool, I have gone through every PDF on the hcrcnow website for Lincoln jacks and was unable (or too ignorant) to find an exact match. I have another Lincoln, a w93649, which was easy to find information on. But this one, with the flat side plates and pressed "strengthening rib" has me befuddled. Most Lincolns on the hcrcnow site are designed like my w93649 with bent strengthening ribs at the top, like this: