Vintage 7-up Sign

My boyfriend had to do a bid for a remodeling job. I went with him to check the place out and came across this sign. I fell in love with it. It's so colorful, and quite large I might add (about 6 by 3 1/2 feet). I also believe that it lights up. I threw out the idea that part of his payment for the work he will do could include this sign. I've researched 7-up signs all over the internet but cannot find a single one like this. I really don't want him to get this sign, only to be short-changed on his work. Does anyone have any idea when this sign was produced and how much it's worth?