This United States postage sheet, with Scott# 3154-57, is a must-have for collectors who are interested in music and musicians. The sheet features four 32 cent stamps that depict famous opera singers. The stamps are in mint condition, never hinged, and have not been graded. The sheet was issued in 1997 and is an excellent addition to any stamp collection. It has not been certified but is of high quality and is a great representation of the United States' rich history of music and the arts. Don't miss out on the opportunity to own this beautiful sheet!