Amm married Annie Joyce Peppercorn; they had two daughters and a son, all born in the 1930s. During World War II he joined the South African Air Force, serving as a flying instructor; he then served in Egypt and the Middle East, as well as Italy, with the rank of major. After the war, he sold his farm and founded the South Coast Aviation Company. From there, he moved on to citrus farming, managing Valencia Estates at
Letaba. His last known occupation was general manager of Tzaneen Co-operative Citrus Company Ltd., Politsi,
Tzaneen, Mpumalanga, South Africa. ==Death==