Pyrex Casserole Dish, Yellow Verde, Model 471, One Pint, small. The yellow color of this dish is more pale and not bright showing it to be older, but being part of the Cinderella line it would have been available any time after 1958. This size would be more for a casserole for one and not a family, this dish doesn't look like it was used much. The finish is still shiny. A lid was available but not included with this dish.
Any marks are available in the pictures.