When did Fender first start making 5 string basses?

Fender first introduced a 5 string bass in the late 60s. It was a funny instrument with an ultra long scale length but only 15 frets. The fifth string was actually a high C, allowing players to fret high notes despite only having 15 frets. Needless to say, this was a flop and was discontinued. Fender started producing modern 5 string basses with a low B string in 1999.