On their "How to" instruction videos the cam on there appears to be genuine.
I tried to see the serial number on the cam but not certain if it says 5210a at the beginning or not. The counterfeits start with another number which I think was the number 8 if I remember correctly.
Like tbone says it says Ltl Acorn on the cam and the counterfeits usually have no name on them.
It still doesn't prove that the cams they're making are genuine though.
On their website they've put "formally Ltl Acorn" and I wondered if they mean "known formally as Ltl Acorn" cos they've spelt it "formally" not "formerly".
There is also a video of the factory which contains alot of motherboards but doesn't show the finished cam and outer case.
My advice would be to tread very carefully