A female marketing executive at DeBeers created the tagline "a diamond is forever" around 1940 ... they have stuck with the slogan and successfully marketed it since that time.
I think it is Zale's jewelers.
De Beers
DeBeers
De beers
Forever begins now.
Which company tagline do more with less
CNBC TV18 has the tagline 'Profit from it'
IBM has the tagline think
vodafone
vodafone
interview with the vampire
The company that used the tagline "for the fun of it" is Coca Cola. They used it for their Diet Coke advertising.