Radio distress beacon (EPIRB), model Tron 25, integral dummy version, by Jotron electronics, Norway, 1981-1990. Radio Distress Beacon (EPIRB), 1980s 1981-1990
Radio distress beacon (EPIRB), model Tron 3OS, one of two, cutaway version, by Jotron electronics, Tjodalyng, Norway Radio Distress Beacon (EPIRB), 1980s 1981-1990