Packer Auto Specialty Company is the maker, Jim. They branded these "Ray" socket sets. Later versions with more conventional ratchets (some of them made for them by Indestro) were marked Packer Auto Specialty and had a cool logo with the word Ray and a field of radiating lines behind it. Yours is earlier.
Is it 5/8-inch drive?
If that's a barrel type ratchet with a reversible rolling clutch action and a folding handle (not visible in pic?), I'd love to see a couple close-ups. The early Mossberg Auto-Cle ratchet was the same style. By the way, you said there are no mfgr's marks but it looks like it's marked to me.
Very nice find! I have never seen one in the wild.