Vintage studio pottery vegetable steamer

Beautiful piece, possibly 70s?, signed, lovely rustic glaze and earthy color scheme. Aside from a small chip inside the rim of the lid (lid still sits fully), a blue mark on the bottom, and a couple of spots of light crazing on the interior glaze (see photos), there are no issues of note. This is intended as a vegetable steamer—you chop veggies, place inside, then set the steamer in a pot of boiler water—but also makes a lovely decorative piece. I cannot confirm if the glaze is lead-free. 7.25” diameter 4.25” counter to rim