I've been to China twice, I have a chinese wife. They do some some strange things there. Some is legit, some shady. There are very good products and really shitty products. I've also seen shipping labels with diferent items listed than the actual parts that have been shipped. For ease of customs i would think. Last year i ordered a very expensive ultra sonic welder for plastics for my company. Bought it from a very well known american company, Branson, top of the line. The new welder was dropped shipped to me directly from China. No big deal, it was a very good machine in every way and still is. I looked at the shipping docs and it said there were toys inside the crate. Thought that was funny and strange and even showed Branson the docs.
I have traveled all over Asia and China, always looked, never saw a pinball machine anywhere except there is one place in Hong Kong that has a few. Newer sterns. So I would guess that is where they got ahold of one if its real at all. I read something one time that bally/williams had a policy to not sell or ship to asia for this very reason. Not sure the truth but makes sence.
Edit, the wifes looking into it, see it its a real company. She's from near that city