Yes, but I think many of us have used WJs interchangeably (JK's excepted) with no problems. So I would try the WJ but make sure you can return the case if it doesn't fit.jmathesonjr said:
Regarding whether or not a Jupiter will fit in a case made for a Selmer or Yamaha, my daughter has a Jupiter case holding her Yamaha sax and I've used the same case for my Selmer.