My '87 JD was my main bass for 20 years until I went to 5-strings in 2007, and it's still with me getting the occasional run out. Superb neck - it took a long time to find a 5-string with an equivalently playable neck.
I assume the OP's is from a transition period (though I don't know how long a period), as it's got the 2-piece bridge rather than the earlier one-piece Schaller, and a JAN I, but it has a carved rear to the headstock rather than the plain flat rear, and a separate battery compartment rather than the battery living in the control cavity as it dd later.