This is stunning! It is unmarked but all of my research and knowledge points to McCoy. I would also consider the color to be of the aqua variety but I am not sure if that is the actual name for this color. It is in excellent vintage condition. It exhibits many  condition "issues" mostly associated with the creation including uneven glaze marks, indents/holes in the pottery as well as rough and raised spots. Please refer to photos and let me know if you have any questions. It is quite heavy. If shipping ends up being less, I will send you a refund for the difference.