this page specifies that it's from her uk variant manufactured in china, which is supported by this listing (see the front of the box)
and i guess this leaflet uses that dress pattern, which is pretty neat.

in terms of other country variants, i think they're all on the wiki.

honestly i'm not sure what specifically you're referring to (since i've never played it), but have you checked moonbreeze's website?

wow, they're super pretty! i recently acquired a #6 with a cm body, it cleaned up well with regular dish soap and the paint was unaffected. you'd most likely be okay washing the clothes in the same manner. the front curls are stable enough to be washed with shampoo without falling out - the ponytail on mine had fallen out a long time ago, so i can't give suggestions on that. generally i suggest avoiding abrasive cleaning utensils (toothbrushes, magic erasers, etc. i used a q-tip for the scrubbing).
another thing to note is that the articulated legs have tiny holes in them (i'm not sure if yours are articulated?), so you'll want to make sure water doesn't build up inside. this was a nonissue for me since i live in such a dry climate.
i don't have any suggestions on anything else unfortunately because i have no experience with it, though i hope someone else will!

i limited my choices to the ones that i own and it was quite a difficult decision between three of them. i went with half note. although if i had her, lofty would've been a strong contender as well