Ponti designed boatloads (literally) of furniture, so who knows, but doing some quick searches I did not see this chair associated with him. The arm shape on yours is similar enough to these Cassina model 803 chairs from 1954 that you could call it "in the style of" Ponti. Carlo di Carli and Marco Zanuso also did some similar designs.
And you could always spend some time on the Ponti archives trying to find it.
Light12 liked
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