Career
Peter Keller served the American Stamp Dealers Association (ASDA) for twenty five years, nearly tripling its membership (from 400 to 1100) during his tenure as director and executive officer Peter also founded the Lions International Stamp Club and was president of the International Federation of Stamp Dealers during 1958 and 1959. Peter and Helen organized the first ASDA national show in 1949, and continued to support subsequent shows.