1960s Protona Minifon Wrist Watch Surveillance SetSecret Agent Vibes Whilst nowadays our smartphones might have more features as any secret agent ever wished for in the middle of the last century, this unique time witness was peak technology back then. So instead of using your voice memo function on your phone, back then you would need a Protona Minifon Set to record any of your conversations. Be careful irony: So you just had to wrap this inconspicuous watch around your wrist (That btw, because of