US #1596a Eagle & Sheild Error Pair - 1975 Imperforate Error Pair

Imperforate errors result when the perforations are absent from a normal perforated stamp. Most imperforates are sold as pairs to fully show the extent of the error. This 1975 13¢ Eagle and Shield pair is one of the only imperforate errors from the Americana Series. (United States #1596a imperf pair)