That's a repaired neck break! Though I'm puzzled as to why you are saying it is a 90's bass. By 1990 Warwick necks were Maple with Wenge stringers; that neck is predominantly Wenge and likely an 80's bass.
'If' done correctly and by someone who knows what they are doing, a break can be repaired as strong as new. However... the fact you can see it a mile away makes me wonder how competent the repairer was. Unless it was significantly cheaper than other examples I'd just wait for another to come along. Saying that, if this was repaired in the late 80's and looked like that when repaired, then it is 35 years with that repair so could be fine.