Vintage Late 1950s Blaupunkt Cloth ” Stereophonic ” Advertising Banner Sign! Very hard to find! Thanks and Good Luck! Radio Stereo Audio Germany Volkswagon VW Mercedes. The item “Vintage Late 1950s Blaupunkt Cloth Stereophonic Advertising Banner Sign” is in sale since Saturday, November 24, 2018. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Radios”. The seller is “leejuke” and is located in Longmont, Colorado. This item can be shipped worldwide.