[quote name='LukeFRC' post='1367639' date='Sep 9 2011, 01:56 PM']If he doesn't turn up PM warwickhunt....[/quote]
It was indeed mid 90's when Warwick changed factory location BUT Warwick necks have been subtly different across the ranges and over the years any way! For instance; there's no guarantee that an 89 will be any slimmer than a 91, though I tried a 93 (pre factory move) that was chunkier than my 90. However, saying all of that, the very earliest basses were categorically slimmer (82-86/87 though post 86/87 pre 95/96 basses are not generally big necks) BUT I'm not so sure that the 5 strings were as different in profile as the 4's!
I'd certainly say try before you buy if you are thinking of trading and adding cash.