Lol, I don't think they were built for any particular region, I'm reading the history and it looks like they just designed and built the best bike they could.
Saying that it was a BRITISH design, I don't think the US was even a thought back then and considering India's population is sitting on 1.2
Billion vs the US's 300k, I don't really think it was thought of now
sorry, but as far as sales go, I don't think the US really features.