1/ How many years the original Amvox II was produced?
I guess that for a total of 1450 watches, they needed let's say two to three years. Don't forget that the release of the black concept needed a bit more time. The first Black Concept were delivered in mid 2007, if I remember correctly.
2/ Yes, only the original version had some issues.
3/ No I wouldn't fear buying one " unworn " model. I just doubt that in 2015, the Watch is still BNIB. I would consider a service, if really unworn, after 9 years without being worn.
Best,
Nicolas