Some models will never be found in the catalogs, that's just the way it is.
I'm not sure what year the changeover occurred but using the formula it will be easy for you to tell.
A 7 digit number example - C5030567 - translates, 5 = 1995, 03 = 3rd month [March], 0567 = 567th guitar built in March 1995.
Because allot of it can be confusing I'll spell out as many model/serial types as I can remember tonight in a fully inconcise and dribble filled rant.
;) This page is for dating Ibanez guitars built in Japan only.
See the Factories heading a few paragraphs down for little info on guitars produced elsewhere.