Ok, after a little more research it appears to be one of the Unification church (moonie) feinwerkbau clones!
Ye Wha model MSK ST100
https://forum.vintageairgunsgallery....wb-300s-clone/
https://forum.vintageairgunsgallery....rgun-business/
You couldn’t make it up. Tong Il now are a major South Korean arms manufacturer.
It’s a great old school target rifle with a somewhat unique history!