Three Egyptian artifacts left the Cleveland Museum of Art on October 1, 1992, but never arrived at their New York gallery destination. A reward of up to $50,000 is being offered for their safe return and/or any information leading to their recovery and the apprehension, arrest and conviction of the person(s) responsible for their disappearance. The missing items are a 13-inch-high bronze mirror with a handle in the form of the god Bes from about 1450 B.C. (above, left); a 5.5-inch-high granite portrait head (above, right) dating to about 1300 B.C., and a fourth-century B.C. black diorite head, 7.5 inches high. Anyone with information should contact Maxon Young Associates, 45 West 45th Street, Suite 1100, New York, New York 10036 (1-800-766-2779) or the nearest office of the F.B.I.