universal stsatuary corp. chicago 1966

we bought two clown statues made in (universal statuary corp.chicago 1966). One of them is sad faced with a tear from where he is crying and the other on is happy. one collector nimber is 349 and the other one is number 350. The They are in excellent condition. they also have a letter (c) on them with a circle around it. Can anyone give me any information on them?