This is the rare 1950’s era Mono FM Tuner by REL and is part of an Estate find. Serial Number C1377-1. Details and specs familiar to collectors and knowledgeable audiophiles. This unit is listed as non-working and to be sold AS IS. As i am not technically experienced and for overall safety, it has not been tested by me. Thus, no clear information is available about its overall functionality. The pictures reveal a well-preserved intact unit.