You know Proptop, I had thought about Tiger Shark early on before I posted here then forgot to mention it in my post. I had looked on the Kangke USA website
early on as a search for TS .52 had brought up but their site but did not show any Tiger Shark engines just JBA and SK. I now have found Kangke USA Tiger
Shark page that does indeed show a Tiger Shark engine with the same exact logo on it as mine, so mystery solved!
http://www.kangkeusa.com/Engines/tsengines.htm