LONG'S COMMISSIONS ART FOR BOSTON MARATHON Long's Jewelers has commissioned local artist E. Joseph Fontaine to create an original work of art to be the official poster for the 100th running of the Boston Marathon in April 1996. Long's, a 116-year-old firm with five stores in the Greater Boston area, has been the official award supplier of the Boston Marathon for a number of years. Fontaine, known for paintings of local scenes and coastal subjects, is listed in "Who's Who in American Art" and "Art in America." The Boston Athletic Association tapped both Long's and Fontaine to create the marathon's official image. Fontaine's work will be represented on a complete line of clothing, giftware and timepieces to commemorate the world-class event. JEWELERS DONATE TO OKLAHOMA CITY Jewelers were among those making donations to the victims of the Oklahoma City bombing tragedy this spring.