Olympic Airlines (AU) A340-500:
And the A340-300:
Actually the -300 variant is real, because real Olympic Airways did use 4 of these with 295 seats replacing the old B747-284. According to wikipedia, this variant was the A340-313X and first seem to had the registration SX-DFA. Both design have different flag from the real (anyone who wants to do the real double wavy Hellenic/European flag is free to modify mine).
So if finally use the A340-300 it will be the real -313X variant. In page 57 of my AU I have the A330-300, but the question is if these two aircraft are comparable or not. Please comment.
Following the real resistration system but in AU form we have: SX-(Hellas, real or AU), when first letter is : "A" single engine aircrcaft, "B" two engines, "C" three engines etc. Then second letter applies somewhat to aircraft type by chronological order. In four engined aircraft first ("A") was the DC-4/C-54, second ("B") was the Britannia, "C" was the Comet, "D" the VC.10, "E" is the A340 and "F" the AC-100. Exceptions were the B747 (and the Concorde in AU) which used the initials of the company "OA". Final letter is coding the date this paticular aircraft type entered service. So, the SX-"DEF" of A340-500 above translates to this: Hellenic registered, four engine aircraft, model Airbus A340, the fifth airframe of this type entering service.