I picked this up at an auction a few years ago, thinking that I'd use it as a by pass filter. It was horribly dirty, and it mostly just sat in the garage. Well, it's clean now, but I can't figure out how it works. I can't see how oil is actually filtered as I don't see a clear path through the media.
The filter cartridge actually moves up and down when the whole thing is assembled. Plus, there is no good seal between the cartridge and the filter canister body, or center post.
Here are my pictures on Photobucket:
It almost identical to the filter I saw on a Detroit 2-71 recently, but mine has no writing on the lid.