The Ama (sea women) are a group of japanese divers famous for collecting pearls. Even in modern times, ama dive without scuba gear or air tanks, making them a traditional sort of free-diver.
A vintage tape recorder from 1924: the Blattnerphone steel tape recorder.
Developed by Dr. Kurt Stille and Louis Blattner. Used at BBC studios to record programs for rebroadcast in other countries.