Hi John,
If it is kit No.5516 Spitfire MkI/II, it is meant to be a combination of old Hasegawa MkVb fuselage and new revell wings. Hense the raised panel lines on the fuselage and engraved on the wings. At least that's what I've read in various reviews.
It looks like you'd better get back to that model shop and buy as many as you can at that price!
Mark