1978 Fender Fretless Precision Bass Neck with Phenolic Resin Fingerboard - Jaco!

Some Jaco fan replaced the original rosewood fingerboard with phenolic resin. They also installed a hand cut wood nut. It’s not 100% straight, it might flatten out once strings are put on and it has some tension on it but be prepared to do some sanding if it doesn’t. You’ll probably want to sand and round the edges, too.