Back Bay Ringers, Boston's Premier Handbell Ensemble, presents a holiday concert at First Parish Waltham on Saturday, Dec. 12th at 7:30pm, as part of its holiday concert series. BBR is an advanced, auditioned community-based ensemble performing at Boston-area landmarks as Faneuil Hall, Symphony Hall, and the Prudential Center, as well as taking part in festivities associated with the 2004 Democratic National Convention and the Boston Marathon.