is rather arbitrary: the very first A2000 (A1000 based) was developed in Germany, but was very quickly replaced with the West Chester design (A500 based). There is no 'the' A2000 hardware, because there are two different versions. "In which country was the firstA2000 hardware developed" would be more appropriate.
Commodore always called the American A2000's B2000's I think, if you look at the techincal docs showing the pinout of the CPU slot its always A2000/B2000.
That said, the front cover always showed the A2000 text...
