I've been doing some searching, but can't seem to find a solid answer. Here's the full question: When did Fender first start making "low B" 5 string basses? I know that they did the "high C" basses for awhile in the 60's, but I'm interested in knowing when they started continuous regular production of the "more common" low B instruments. I'm sure there were likely some one-offs and custom instruments, but I would like to know what the first line of 5's was that Fender produced on a regular basis. Any experts?