Red WIng 901

I have a 7 inch by 3 1/2 inch by 3 inch rectangular robins egg blue with speckles on it planter?? I think. It is marked onthe bottom red wing USA 901. Can you tell me anything you know about this very cute but unusual item?

Answer: It was designed in 1964. There is a blue glaze that would match your description. Value is around 25.00 or so. thanks, steve n rose