The Weil Furniture Company stated in a newspaper advertisement that each person who sent in an accurate estimate of the number of dots in the ad would receive a credit certificate which could be applied in the purchase of a certain make of television set. Schreiner mailed his estimate and was notified that he had won one of the certificates. The certificate he received stated that it could be used only in the purchase of certain models. The newspaper ad had not contained this restriction. Schreiner objected to this restriction.