Moon JB-4

Got my Moon JB-4ON  today.  It's an older one with early logo and 11352 serial.  Perhaps it's 1991. Can't find any information about it.  I should have ripped it down to see if there's a date in the neck pocket, but I just concentrated on getting it playing.  It didn't have any knobs, but I came up with some old reflectors with vol/vol/tone that I put on after polishing the shit off the control plate. The new JB-4 classics have rosewood boards and this has ebony.  Body is 2 piece center seam alder and neck is 1 piece maple.  Don't know the weight, but it seems heavier than my Edwards jazz basses.  Moon has a reputation for going over the top in terms of quality.  This is my second MIJ jazz bass that has backwards tuners!  Testing it out tonight.