Pocket transistor radio's from the 60's, 70's and 80's. The insides have happy coloured transistors and components with a topping of brownish grease and a typical smell. I allway's wonder if that's because they spent time in people's pockets...
On some tuner dials you find small triangles that were ment to tune into in case of disaster or attack as a result of fear for the cold war. When I once bought a radio on a fleamarket and put batteries in to check if it worked, the first sounds that came out were Buzz Aldrin and Neil Armstrong on the Apollo mission. It was like time had stood still in the little machine, even though it was just some regular radioshow that covered an item about space.