Over here (Finland), a car is not required to have a radio at all. In fact, even speedometer only became mandatory in new cars in 1984, so cars older than that

Over here (Finland), a car is not required to have a radio at all. In fact, even speedometer only became mandatory in new cars in 1984, so cars older than that are legal without one. (Otherwise, the authorities here have been ridiculous with car equipment requirements, particularly before EU time, as they wanted to ensure the revenue collection from car taxes. For instance, one year third brake lights were illegal as "dangerous", then very suddenly at the time of EU membership they then became mandatory in new cars. The authority is still in constant breach of EU rules, and the authorities do nothing; officials break the law and there are no, zero, zilch consequences.)