This is a green Anchor Hocking, Colonial aka Knife and Fork pattern, cereal bowl. This pattern was manufactured for only two years, between 1934 and 1936. This piece fluoresces when placed under a black light.
I have two (2) of these little bowls for sale, each one separately. They are both in very good condition.
Take a look at the pictures, and if you have questions, please e-mail.