I just landed a 1998 JB4A, which may not be what you are asking about, but I can add that, blimey it's killer.
@BlueMoon is indeed correct about the weight. mine is ash bodied and weights a tonne.. well 5.2kg but it´s weighty. Fortunately for me, I don´t mind a heavy bass.
Mine has the Bartolini 9s pups and the NTCT Bart pre amp. It's made for slap (with its mid cut), but mids can be boosted from the board, and finger style, it's warm and fat. Quality in every aspect.
But the neck is also fat. It has a full C (jazz width) profile and feels like a slender bass ball bat. Very similar the BB in the picture in fact. Here again, lucky for me I like em fat, thin, wide or narrow..
Maybe newer Moons have a sallower profile?