Rescued dining table

I rescued this table from a friend who was getting rid of it. I've loved it for years! I imagine it's old b/c it has the wooden casters on the feet. I've never seen anything like and can't afford to have it restored.
It's super wide and has 2 extra leaves with fold down edges to match the trim on the table. I have no idea how old it is, what type of wood it is or even if it is worth anything. Would love some feedback.