What is the colloquial or official name for old fashioned wash basins?

My sister recently picked up an old fashioned wash pitcher and basin, we are wondering what they were called in their time. Any insight would be lovely, thank you very much,

Wash Basin And Pitcher

I've seen these sets called:- pitcher and basin pitcher and wash basin pitcher and bowl Jug and bowl in catalogues at auction. I don't know if there's a more technical name for them