I don't know, but based on your description I would expect it to one of the Cheese pumpkins ( C. moschata) Tan Cheese and Flat White Boer are documented forms, but there are others running around out there under various names like Flat Iron.

Here's an idea for you to possibly try. I did this with some old squash seed which wouldn't sprout for me in the garden. Try sprouting some seed in a damp paper towel, in a plastic bag, slightly open at one end, to allow for some air to enter. If you get a seed to send out a sprout, then place it shallowly in a pot of good potting soil and coddle it under lights. You can even water with 1/4 strength Miracle Grow solution. Once the plant has put out a couple of leaves it is ready to go out in the garden. I also did this with a bean, which I thought I'd lost, and managed to get one good plant out of a bottle of "dead" seeds.

George
Tahlequah, OK