Greetings,
Looks like the one offered by "Ricketts" on eBay.
It "might" be an original Star that was "vandalized" by a previous owner to attach a case feed of some sort. The tool head has the Star trademark.
All the shell plate locking rings I have seen from Star were knurled. This one has no knurling.
Ricketts does not answer questions via eBay, so one could take a chance and buy it and if not satisfied, send it back via eBay.
I have been outbid, so the rest of you do not have to worry about me raising the price.
Happy bidding,
Dave