Original 1989 45c Airmail / 25c "America Series" C121 / 2426 K.M.C. Venture 500th Anniversary of Christopher Columbus's Arrival in America First Day Cover. Canceled October 12, 1989 San Juan, PR. Envelope measures approximately 3 5/8" x 6 1/2". Please see pictures. Will be packaged well to assure no damage.