It is a RCS 30cc or 1.80 cubic inch displacement gasoline engine.
They called the company RC Showcase.
I think that they made the engines in Hungary and they went out of business circa 2009. Some of the employees went to work for ZDZ afterwards.
I am not sure if ZDZ bought up the leftovers or not. of course ZDZ could have been the company making the engines for RCS too.