Austin, Texas-based 3M Electrical Markets Division is celebrating the 60th anniversary of its invention of vinyl electrical tape, which has evolved over the years to Scotch Super 33+ and is the only vinyl electrical tape still made in the United States. In observance of this milestone, 3M is running a campaign, including a sweepstakes, evoking memories of the late 1940s and celebrating the American worker and American craftsmanship.