I may be totally wrong here, so I welcome corrections by all means...

But I think the first year Volvo sold cars in the US was 1956. Don't know if they only sold the 444 that year or if the 445 was also available..or if it even existed for that matter. I'm fairly certain the wagon would have been available here by '57. I would assume that the P210 would have been around as late as the 544...1965. But perhaps they might have been offered later for commercial applications. Perhaps '67, but thats just a guess.

Just out of curiosity, why do you ask? Do you have an exceptionally early or late car?

-Matt