My first thought is that it could have been part of someone's photography lab. It looks like a large tray for washing photo chemicals from prints, but it probably wouldn't have been that deep unless that was the only basin available.
Swimming pool for lobsters?
Baby's bath tub?
Dog washing station ??
So what are you going to do with it?
View attachment 136580
I think it's a
stream table . It's used to teach hydrogeology. They cost 600-1,500 bucks.
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